fix: Remove text visibility bounds check

- Add bounds checking to only render text when line is on screen
- Fix text positioning to be consistent with line position

css/refined.css

@@ -217,3 +217,51 @@ body {
     }
 }
 
+/* Trendline Settings Panel */
+#trendlineSettingsPanel input[type=range] {
+    -webkit-appearance: none; 
+    background: transparent; 
+}
+
+#trendlineSettingsPanel input[type=range]::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    height: 12px;
+    width: 12px;
+    border-radius: 50%;
+    background: #ffffff;
+    cursor: pointer;
+    border: 2px solid #1a2333; 
+    margin-top: -4px; 
+}
+
+#trendlineSettingsPanel input[type=range]::-webkit-slider-runnable-track {
+    width: 100%;
+    height: 4px;
+    cursor: pointer;
+    background: #2d3a4f;
+    border-radius: 2px;
+}
+
+.color-swatch {
+    width: 20px;
+    height: 20px;
+    border-radius: 3px;
+    cursor: pointer;
+    border: 1px solid transparent;
+    transition: transform 0.1s, border-color 0.1s;
+}
+
+.color-swatch:hover {
+    transform: scale(1.1);
+    border-color: #ffffff;
+}
+
+.color-swatch.active {
+    border-color: #ffffff;
+    box-shadow: 0 0 0 1px #ffffff;
+}
+
+.tl-thickness-btn[data-active="true"], 
+.tl-style-btn[data-active="true"] {
+    background-color: #2d3a4f;
+}

index.html

@@ -24,7 +24,7 @@
         #rightSidebar.collapsed {
             transform: translateX(100%);
         }
-        
+
         /* Tab Styles in Sidebar */
         .sidebar-tab {
             @apply px-4 py-2 text-sm font-medium text-gray-400 hover:text-white transition-colors border-b-2 border-transparent;
@@ -32,7 +32,7 @@
         .sidebar-tab.active {
             @apply text-blue-500 border-blue-500;
         }
-        
+
         /* Hide scrollbar for clean UI */
         .no-scrollbar::-webkit-scrollbar {
             display: none;
@@ -52,14 +52,14 @@
             <button id="mobileMenuBtn" class="md:hidden w-10 h-10 flex items-center justify-center text-[#8fa2b3] hover:text-white hover:bg-[#2d3a4f] rounded-md transition-colors z-50">
                 <span class="material-symbols-outlined text-lg">menu</span>
             </button>
-            
+
             <!-- Search/Symbol Button -->
             <div class="hidden md:flex items-center space-x-3 bg-[#1a2333] px-3 py-1.5 rounded-md cursor-pointer border border-[#2d3a4f]">
                 <span class="material-symbols-outlined text-sm text-[#8fa2b3]">search</span>
                 <span class="font-bold text-sm text-[#dfe2f2]">BTC/USD</span>
                 <span class="material-symbols-outlined text-sm text-[#8fa2b3]">chevron_right</span>
             </div>
-            
+
             <!-- Mobile Search -->
             <div class="md:hidden flex items-center bg-[#1a2333] px-3 py-1.5 rounded-md cursor-pointer border border-[#2d3a4f]">
                 <span class="material-symbols-outlined text-sm text-[#8fa2b3]">search</span>
@@ -67,7 +67,7 @@
                 <span class="material-symbols-outlined text-sm text-[#8fa2b3] ml-2">chevron_right</span>
             </div>
         </div>
-        
+
         <div class="hidden md:flex items-center gap-2 mr-4">
              <div class="w-2 h-2 rounded-full bg-green-500" id="statusDot"></div>
              <span class="text-xs text-[#8fa2b3]" id="statusText">Live</span>
@@ -104,55 +104,149 @@
            <!-- Chart Container -->
             <section class="relative w-full bg-[#0d1421] h-[60vh] md:h-[70vh]" data-purpose="chart-container" id="chartWrapper">
                  <div id="chart" class="w-full h-full"></div>
-                 
+
-                 <!-- Vertical Drawing Toolbar (Left) -->
+                 <!-- Horizontal Drawing Toolbar (Top) -->
-                 <div class="absolute left-2 top-1/2 -translate-y-1/2 flex flex-col gap-1 z-30 bg-[#1a2333]/80 backdrop-blur border border-[#2d3a4f] p-1 rounded-md shadow-xl" id="drawingToolbar">
+                 <div class="absolute top-2 left-1/2 -translate-x-1/2 flex flex-row gap-1 z-30 bg-[#1a2333]/80 backdrop-blur border border-[#2d3a4f] p-1 rounded-md shadow-xl" id="drawingToolbar">
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('cursor')" title="Cursor">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('trend_line', event)" title="Trend Line">
-                        <span class="material-symbols-outlined text-sm">near_me</span>
-                    </button>
-                    <div class="w-full h-[1px] bg-[#2d3a4f] my-0.5"></div>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('trend_line')" title="Trend Line">
                         <span class="material-symbols-outlined text-sm">call_split</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('ray')" title="Ray">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('horizontal_line', event)" title="Horizontal Line">
-                        <span class="material-symbols-outlined text-sm">trending_flat</span>
-                    </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('horizontal_line')" title="Horizontal Line">
                         <span class="material-symbols-outlined text-sm">swap_horizontal_circle</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('vertical_line')" title="Vertical Line">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('vertical_line', event)" title="Vertical Line">
                         <span class="material-symbols-outlined text-sm">swap_vert</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('fib_retracement')" title="Fibonacci Retracement">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('rectangle', event)" title="Rectangle">
-                        <span class="material-symbols-outlined text-sm">reorder</span>
-                    </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('rectangle')" title="Rectangle">
                         <span class="material-symbols-outlined text-sm">crop_square</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('text')" title="Text Label">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('text', event)" title="Text Label">
                         <span class="material-symbols-outlined text-sm">text_fields</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('arrow_up')" title="Arrow Up">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('arrow_up', event)" title="Arrow Up">
                         <span class="material-symbols-outlined text-sm">arrow_upward</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('arrow_down')" title="Arrow Down">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('arrow_down', event)" title="Arrow Down">
                         <span class="material-symbols-outlined text-sm">arrow_downward</span>
                     </button>
-                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('measure')" title="Measure">
+                    <button class="w-8 h-8 text-gray-400 hover:text-white hover:bg-[#2d3a4f] rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('measure', event)" title="Measure">
                         <span class="material-symbols-outlined text-sm">straighten</span>
                     </button>
-                    <div class="w-full h-[1px] bg-[#2d3a4f] my-0.5"></div>
+                    <div class="w-[1px] h-full bg-[#2d3a4f] mx-0.5"></div>
-                    <button class="w-8 h-8 text-red-400 hover:text-red-300 hover:bg-red-900/20 rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('clear')" title="Clear All">
+                    <button class="w-8 h-8 text-red-400 hover:text-red-300 hover:bg-red-900/20 rounded flex items-center justify-center transition-colors" onclick="window.activateDrawingTool('clear', event)" title="Clear All">
                         <span class="material-symbols-outlined text-sm">delete</span>
                     </button>
                  </div>
 
+                 <!-- Trendline Settings Panel -->
+                  <div id="trendlineSettingsPanel" class="hidden absolute top-14 left-1/2 -translate-x-1/2 bg-[#1a2333] border border-[#2d3a4f] rounded-lg shadow-2xl z-50 w-[280px] p-0 text-sm font-['Inter']">
+                     <!-- Drag Handle -->
+                     <div id="tlPanelHeader" class="h-8 flex items-center justify-between px-3 border-b border-[#2d3a4f] cursor-move bg-[#1f2937] rounded-t-lg">
+                         <span class="text-[10px] uppercase tracking-wider font-bold text-gray-400">Settings</span>
+                         <button class="text-gray-500 hover:text-white" onclick="window.toggleTLSettings(false)">
+                             <span class="material-symbols-outlined text-sm">close</span>
+                         </button>
+                     </div>
+                     
+                     <div class="p-4">
+                         <!-- Tabs -->
+                         <div class="flex border-b border-[#2d3a4f] mb-4">
+                             <button class="flex-1 py-2 text-center text-blue-500 border-b-2 border-blue-500 font-medium" id="tlTabStyle" onclick="window.switchTLTab('style')">Style</button>
+                             <button class="flex-1 py-2 text-center text-gray-400 hover:text-white" id="tlTabText" onclick="window.switchTLTab('text')">Text</button>
+                         </div>
+
+                        <!-- Style Tab Content -->
+                        <div id="tlContentStyle">
+                            <!-- Color Grid (Line) -->
+                            <div class="grid grid-cols-8 gap-1 mb-4" id="tlColorGrid">
+                                <!-- Colors injected by JS -->
+                            </div>
+
+                            <!-- Opacity -->
+                            <div class="mb-4">
+                                <div class="flex justify-between text-xs text-gray-400 mb-1">
+                                    <span>Opacity</span>
+                                    <span id="tlOpacityValue">100%</span>
+                                </div>
+                                <input type="range" min="0" max="100" value="100" class="w-full h-1 bg-[#2d3a4f] rounded-lg appearance-none cursor-pointer" id="tlOpacityInput">
+                            </div>
+
+                            <!-- Thickness -->
+                            <div class="mb-4">
+                                <label class="text-xs text-gray-400 mb-1 block">Thickness</label>
+                                <div class="flex bg-[#0d1421] rounded border border-[#2d3a4f] p-1">
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-thickness-btn" onclick="window.setTLThickness(1)" data-thickness="1"><div class="w-4 h-[1px] bg-white"></div></button>
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-thickness-btn" onclick="window.setTLThickness(2)" data-thickness="2"><div class="w-4 h-[2px] bg-white"></div></button>
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-thickness-btn" onclick="window.setTLThickness(3)" data-thickness="3"><div class="w-4 h-[3px] bg-white"></div></button>
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-thickness-btn" onclick="window.setTLThickness(4)" data-thickness="4"><div class="w-4 h-[4px] bg-white"></div></button>
+                                </div>
+                            </div>
+
+                            <!-- Line Style -->
+                            <div class="mb-4">
+                                <label class="text-xs text-gray-400 mb-1 block">Line style</label>
+                                <div class="flex bg-[#0d1421] rounded border border-[#2d3a4f] p-1">
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-style-btn" onclick="window.setTLStyle(0)" data-style="0"><div class="w-6 border-b border-white"></div></button>
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-style-btn" onclick="window.setTLStyle(1)" data-style="1"><div class="w-6 border-b border-dashed border-white"></div></button>
+                                    <button class="flex-1 h-6 flex items-center justify-center hover:bg-[#2d3a4f] rounded data-[active=true]:bg-[#2d3a4f] tl-style-btn" onclick="window.setTLStyle(2)" data-style="2"><div class="w-6 border-b border-dotted border-white"></div></button>
+                                </div>
+                            </div>
+                        </div>
+
+                        <!-- Text Tab Content -->
+                        <div id="tlContentText" class="hidden">
+                            <div class="flex gap-2 mb-4 relative">
+                                 <!-- Text Color Button -->
+                                 <div class="w-8 h-8 rounded border border-[#2d3a4f] cursor-pointer" id="tlTextColorBtn" style="background-color: #2962ff"></div>
+                                 
+                                 <!-- Text Color Picker Popup -->
+                                 <div id="tlTextColorPicker" class="hidden absolute top-10 left-0 bg-[#1a2333] border border-[#2d3a4f] rounded shadow-2xl p-2 z-[60] w-[210px]">
+                                     <div class="grid grid-cols-8 gap-1" id="tlTextColorGrid">
+                                         <!-- Colors injected by JS -->
+                                     </div>
+                                 </div>
+
+                                 <!-- Font Size -->
+                                 <select id="tlFontSize" class="bg-[#0d1421] border border-[#2d3a4f] rounded text-xs px-2 h-8 text-white focus:outline-none">
+                                     <option value="10">10</option>
+                                     <option value="12">12</option>
+                                     <option value="14" selected>14</option>
+                                     <option value="16">16</option>
+                                     <option value="20">20</option>
+                                     <option value="24">24</option>
+                                 </select>
+
+                                 <!-- Style Toggles -->
+                                 <button class="w-8 h-8 border border-[#2d3a4f] rounded flex items-center justify-center hover:bg-[#2d3a4f] data-[active=true]:bg-blue-600" id="tlBoldBtn" onclick="window.toggleTLBold()">B</button>
+                                 <button class="w-8 h-8 border border-[#2d3a4f] rounded flex items-center justify-center hover:bg-[#2d3a4f] italic data-[active=true]:bg-blue-600" id="tlItalicBtn" onclick="window.toggleTLItalic()">I</button>
+                            </div>
+
+                            <textarea id="tlTextInput" class="w-full h-24 bg-[#0d1421] border border-[#2d3a4f] rounded p-2 text-xs text-white focus:border-blue-500 focus:outline-none mb-4" placeholder="Add text"></textarea>
+                            
+                            <div class="flex items-center justify-between mb-4">
+                                <label class="text-xs text-gray-400">Alignment</label>
+                                <div class="flex gap-2">
+                                    <select id="tlAlignVert" class="bg-[#0d1421] border border-[#2d3a4f] rounded text-xs px-2 h-6 text-white focus:outline-none">
+                                        <option value="top">Top</option>
+                                        <option value="middle">Middle</option>
+                                        <option value="bottom">Bottom</option>
+                                    </select>
+                                    <select id="tlAlignHorz" class="bg-[#0d1421] border border-[#2d3a4f] rounded text-xs px-2 h-6 text-white focus:outline-none">
+                                        <option value="left">Left</option>
+                                        <option value="center">Center</option>
+                                        <option value="right">Right</option>
+                                    </select>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                 </div>
+
                  <!-- Overlay Controls -->
                  <div class="absolute bottom-4 right-4 flex gap-2 z-10 opacity-0 hover:opacity-100 transition-opacity" id="priceScaleControls">
                         <button class="w-8 h-8 bg-[#1e222d] border border-[#2d3a4f] text-gray-300 flex items-center justify-center rounded hover:bg-[#2d3a4f] transition-colors shadow-lg" id="btnSettings" title="Settings">
                            <span class="material-symbols-outlined text-sm">settings</span>
                         </button>
-                        
+
                         <!-- Settings Popup -->
                       <div class="hidden absolute bottom-10 right-0 bg-[#1a2333] border border-[#2d3a4f] rounded-lg py-2 z-50 w-64 shadow-xl text-sm" id="settingsPopup">
 
@@ -197,7 +291,7 @@
                                     <input type="color" id="candleDownColor" value="#ff9800" class="flex-1 h-6 cursor-pointer">
                                 </div>
                             </div>
-                            
+
                             <!-- Decimals -->
                             <div class="px-4 py-2 flex items-center justify-between">
                                 <label class="text-sm text-gray-300">Decimals</label>
@@ -205,7 +299,7 @@
                             </div>
                      </div>
                  </div>
-                 
+
                  <!-- Navigation Controls -->
                  <div class="absolute bottom-4 left-1/2 -translate-x-1/2 flex gap-2 z-10 opacity-0 hover:opacity-100 transition-opacity" id="navControls">
                      <button class="w-8 h-8 bg-[#1e222d]/80 backdrop-blur border border-[#2d3a4f] text-white rounded-full flex items-center justify-center hover:bg-blue-600 transition-colors" id="navLeft">
@@ -225,7 +319,7 @@
                 <div class="flex items-center justify-between mb-4">
                     <h2 class="text-lg font-bold flex items-center gap-2">
                         <span class="material-symbols-outlined text-[#b6c4ff]">analytics</span>
-                        Technical Analysis 
+                        Technical Analysis
                         <span id="taInterval" class="text-[10px] bg-blue-600/20 text-blue-400 px-2 py-0.5 rounded ml-2 border border-blue-600/30">1D</span>
                     </h2>
                     <div class="flex items-center gap-2">
@@ -238,7 +332,7 @@
                         </button>
                     </div>
                 </div>
-                
+
                 <div id="taContent" class="grid grid-cols-2 md:grid-cols-4 gap-4">
                     <div class="text-gray-500 text-sm p-4 text-center w-full col-span-full">Loading analysis data...</div>
                 </div>
@@ -314,7 +408,7 @@
                 <span class="material-symbols-outlined">close</span>
              </button>
         </div>
-        
+
         <!-- Desktop Sidebar Toggle -->
         <button id="sidebarToggleBtn" class="md:flex hidden w-8 h-8 bg-[#1a2333] border border-[#2d3a4f] text-gray-300 flex items-center justify-center rounded hover:bg-[#2d3a4f] transition-colors" title="Toggle Sidebar">
             <span class="material-symbols-outlined text-sm">menu</span>
@@ -353,7 +447,7 @@
         window.toggleSidebarDisplay = function(tabName) {
             const sidebar = document.getElementById('rightSidebar');
             if (!sidebar) return;
-            
+
             const isOpen = !sidebar.classList.contains('collapsed');
             const activeTab = document.querySelector('.sidebar-tab.active');
             const currentTabName = activeTab ? activeTab.dataset.tab : null;
@@ -366,7 +460,7 @@
 
             // Otherwise, OPEN it (remove collapsed) and switch tab
             sidebar.classList.remove('collapsed');
-            
+
             if (tabName) {
                 // Find and click the hidden tab button to trigger existing logic
                 const tabBtn = document.querySelector(`.sidebar-tab[data-tab="${tabName}"]`);
@@ -395,7 +489,7 @@
             }
         };
     </script>
-    
+
     <script src="./config.js"></script>
     <script type="module" src="./js/app.js"></script>
 </body>

js/ui/chart.js

@@ -458,7 +458,10 @@ export class TradingDashboard {
 
         // Initialize Drawing Manager
         this.drawingManager = new DrawingManager(this, chartContainer);
-        window.activateDrawingTool = (tool) => this.drawingManager.setTool(tool);
+        window.activateDrawingTool = (tool, event) => {
+            const e = event || window.event;
+            this.drawingManager.setTool(tool, e);
+        };
 
         // Setup price format selector change handler
         document.addEventListener("DOMContentLoaded", () => {

js/ui/drawing-tools.js

@@ -16,6 +16,49 @@ export class DrawingManager {
         this.dragMode = null; 
         this.isMouseDown = false;
         
+        // Default Settings
+        this.defaults = {
+            trend_line: {
+                color: '#2962ff',
+                width: 2,
+                style: 0, // 0: Solid, 1: Dashed, 2: Dotted
+                opacity: 100,
+                text: '',
+                textColor: '#2962ff',
+                fontSize: 14,
+                bold: false,
+                italic: false,
+                alignVert: 'top',
+                alignHorz: 'left'
+            },
+            horizontal_line: {
+                color: '#2962ff',
+                width: 2,
+                style: 0,
+                opacity: 100,
+                text: '',
+                textColor: '#2962ff',
+                fontSize: 14,
+                bold: false,
+                italic: false,
+                alignVert: 'top',
+                alignHorz: 'left'
+            },
+            vertical_line: {
+                color: '#2962ff',
+                width: 2,
+                style: 0,
+                opacity: 100,
+                text: '',
+                textColor: '#2962ff',
+                fontSize: 14,
+                bold: false,
+                italic: false,
+                alignVert: 'top',
+                alignHorz: 'left'
+            }
+        };
+
         // Dragging offsets
         this.dragStartPos = null;
         this.startP1 = null;
@@ -24,6 +67,7 @@ export class DrawingManager {
         this.startTime = null;
         
         this.init();
+        this.initSettingsPanel();
     }
 
     init() {
@@ -31,6 +75,18 @@ export class DrawingManager {
         
         // Mouse Events
         container.addEventListener('mousedown', (e) => this.handleMouseDown(e));
+        container.addEventListener('dblclick', (e) => {
+            const pos = this.getMousePos(e);
+            const hit = this.findHit(pos.x, pos.y);
+            if (hit) {
+                this.selectedDrawing = hit.drawing;
+                // Only open panel for supported types
+                if (['trend_line', 'ray', 'rectangle', 'horizontal_line', 'vertical_line'].includes(hit.drawing.type)) {
+                    this.toggleSettingsPanel(true);
+                }
+                this.update();
+            }
+        });
         window.addEventListener('mousemove', (e) => this.handleMouseMove(e));
         window.addEventListener('mouseup', (e) => this.handleMouseUp(e));
 
@@ -164,7 +220,13 @@ export class DrawingManager {
         });
     }
 
-    setTool(tool) {
+    setTool(tool, event) {
+        // Shift + Click on trend_line button opens settings
+        if (tool === 'trend_line' && event && event.shiftKey) {
+            this.toggleSettingsPanel(true);
+            return;
+        }
+
         this.activeTool = tool;
         
         if (tool === 'cursor') {
@@ -301,17 +363,47 @@ export class DrawingManager {
             return;
         }
         
-        const color = '#2962ff';
+        const color = this.defaults.trend_line.color;
         const p1 = { time: pos.time, price: pos.price };
         const p2 = { time: pos.time, price: pos.price };
 
+        const defs = this.defaults.trend_line;
         if (this.activeTool === 'trend_line' || this.activeTool === 'ray' || this.activeTool === 'rectangle') {
-            this.currentDrawing = { type: this.activeTool, p1, p2, color };
+            this.currentDrawing = { 
+                type: this.activeTool, p1, p2, 
+                color: defs.color,
+                width: defs.width,
+                style: defs.style,
+                opacity: defs.opacity,
+                text: defs.text,
+                textColor: defs.textColor,
+                fontSize: defs.fontSize,
+                bold: defs.bold,
+                italic: defs.italic,
+                alignVert: defs.alignVert,
+                alignHorz: defs.alignHorz
+            };
         } else if (this.activeTool === 'horizontal_line') {
-            this.drawings.push({ type: 'horizontal_line', price: pos.price, color });
+            const defs = this.defaults.horizontal_line;
+            this.drawings.push({ 
+                type: 'horizontal_line', 
+                price: pos.price, 
+                color: defs.color,
+                width: defs.width,
+                style: defs.style,
+                opacity: defs.opacity
+            });
             this.setTool(null);
         } else if (this.activeTool === 'vertical_line') {
-            this.drawings.push({ type: 'vertical_line', time: pos.time, color });
+            const defs = this.defaults.vertical_line;
+            this.drawings.push({ 
+                type: 'vertical_line', 
+                time: pos.time, 
+                color: defs.color,
+                width: defs.width,
+                style: defs.style,
+                opacity: defs.opacity
+            });
             this.setTool(null);
         } else if (this.activeTool === 'fib_retracement') {
             this.currentDrawing = { type: 'fib_retracement', p1, p2, color: '#fb8c00' };
@@ -376,6 +468,16 @@ export class DrawingManager {
                 return; // Critical: exit here so we don't move measurement points
             }
             
+            if (this.dragMode === 'label') {
+                const dx = pos.x - this.dragStartPos.x;
+                const dy = pos.y - this.dragStartPos.y;
+                if (!d.labelOffset) d.labelOffset = { x: 0, y: 0 };
+                d.labelOffset.x += dx;
+                d.labelOffset.y += dy;
+                this.dragStartPos = pos; 
+                this.update();
+                return;
+            }
             if (this.dragMode === 'p1') {
                 d.p1 = { time: pos.time, price: pos.price };
             } else if (this.dragMode === 'p2') {
@@ -476,10 +578,26 @@ export class DrawingManager {
                 }
             } else if (d.price !== undefined && d.type === 'horizontal_line') {
                 const dy = this.series.priceToCoordinate(d.price);
-                if (dy !== null && Math.abs(y - dy) < threshold) return { drawing: d, part: 'price' };
+                if (dy !== null && Math.abs(y - dy) < threshold) {
+                    if (d.text && d.labelPos) {
+                        if (x >= d.labelPos.x && x <= d.labelPos.x + d.labelPos.width &&
+                            y >= d.labelPos.y && y <= d.labelPos.y + d.labelPos.height) {
+                            return { drawing: d, part: 'label' };
+                        }
+                    }
+                    return { drawing: d, part: 'all' };
+                }
             } else if (d.time !== undefined && d.type === 'vertical_line') {
                 const dx = this.timeToX(d.time);
-                if (dx !== null && Math.abs(x - dx) < threshold) return { drawing: d, part: 'time' };
+                if (dx !== null && Math.abs(x - dx) < threshold) {
+                    if (d.text && d.labelPos) {
+                        if (x >= d.labelPos.x && x <= d.labelPos.x + d.labelPos.width &&
+                            y >= d.labelPos.y && y <= d.labelPos.y + d.labelPos.height) {
+                            return { drawing: d, part: 'label' };
+                        }
+                    }
+                    return { drawing: d, part: 'all' };
+                }
             } else if (d.time !== undefined && d.price !== undefined) {
                 const dx = this.timeToX(d.time);
                 const dy = this.series.priceToCoordinate(d.price);
@@ -604,6 +722,20 @@ export class DrawingManager {
         return x1 + ratio * (x2 - x1);
     }
 
+    hexToRgba(hex, opacity) {
+        let r = 0, g = 0, b = 0;
+        if (hex.length === 4) {
+            r = parseInt(hex[1] + hex[1], 16);
+            g = parseInt(hex[2] + hex[2], 16);
+            b = parseInt(hex[3] + hex[3], 16);
+        } else if (hex.length === 7) {
+            r = parseInt(hex.slice(1, 3), 16);
+            g = parseInt(hex.slice(3, 5), 16);
+            b = parseInt(hex.slice(5, 7), 16);
+        }
+        return `rgba(${r}, ${g}, ${b}, ${opacity / 100})`;
+    }
+
     render(target) {
         target.useMediaCoordinateSpace((scope) => {
             const ctx = scope.context;
@@ -615,8 +747,16 @@ export class DrawingManager {
             allDrawings.forEach(d => {
                 const isSelected = d === this.selectedDrawing;
                 ctx.save();
-                ctx.strokeStyle = d.color;
+                
-                ctx.lineWidth = isSelected ? 3 : 2;
+                // Base Style
+                const color = d.opacity !== undefined ? this.hexToRgba(d.color, d.opacity) : d.color;
+                ctx.strokeStyle = color;
+                ctx.lineWidth = d.width || (isSelected ? 3 : 2);
+                
+                if (d.style === 1) ctx.setLineDash([10, 5]); // Dashed
+                else if (d.style === 2) ctx.setLineDash([2, 2]); // Dotted
+                else ctx.setLineDash([]); // Solid
+
                 if (isSelected) { ctx.shadowBlur = 5; ctx.shadowColor = d.color; }
 
                 if (d.type === 'trend_line' || d.type === 'ray') {
@@ -634,7 +774,29 @@ export class DrawingManager {
                             ctx.lineTo(x2, y2);
                         }
                         ctx.stroke();
+
+                        // Render Text if present
+                        if (d.text) {
+                            ctx.save();
+                            ctx.setLineDash([]); // Text should not be dashed
+                            const fontSize = d.fontSize || 14;
+                            const fontStyle = (d.bold ? 'bold ' : '') + (d.italic ? 'italic ' : '');
+                            ctx.font = `${fontStyle}${fontSize}px Inter`;
+                            ctx.fillStyle = d.textColor || color;
+                            ctx.textAlign = d.alignHorz || 'left';
+                            ctx.textBaseline = d.alignVert === 'middle' ? 'middle' : (d.alignVert === 'bottom' ? 'top' : 'bottom');
+                            
+                            const tx = (x1 + x2) / 2;
+                            const ty = (y1 + y2) / 2;
+                            const offset = 10;
+                            const finalTy = d.alignVert === 'top' ? ty - offset : (d.alignVert === 'bottom' ? ty + offset : ty);
+                            
+                            ctx.fillText(d.text, tx, finalTy);
+                            ctx.restore();
+                        }
+
                         if (isSelected) {
+                            ctx.setLineDash([]);
                             ctx.fillStyle = '#ffffff';
                             ctx.beginPath(); ctx.arc(x1, y1, 5, 0, Math.PI * 2); ctx.fill(); ctx.stroke();
                             ctx.beginPath(); ctx.arc(x2, y2, 5, 0, Math.PI * 2); ctx.fill(); ctx.stroke();
@@ -657,19 +819,131 @@ export class DrawingManager {
                     }
                 } else if (d.type === 'horizontal_line') {
                     const y = series.priceToCoordinate(d.price);
-                    if (y !== null) {
+                    if (y !== null && y >= 0 && y <= scope.mediaSize.height) {
+                        ctx.save();
+                        ctx.strokeStyle = d.opacity !== undefined ? this.hexToRgba(d.color, d.opacity) : d.color;
+                        ctx.lineWidth = d.width || 2;
+                        if (d.style === 1) ctx.setLineDash([10, 5]);
+                        else if (d.style === 2) ctx.setLineDash([2, 2]);
+                        else ctx.setLineDash([]);
+                        if (isSelected) { ctx.shadowBlur = 5; ctx.shadowColor = d.color; }
                         ctx.beginPath();
                         ctx.moveTo(-1000, y);
                         ctx.lineTo(scope.mediaSize.width + 1000, y);
                         ctx.stroke();
+                        if (isSelected) {
+                            ctx.setLineDash([]);
+                            ctx.fillStyle = '#ffffff';
+                            ctx.beginPath(); ctx.arc(0, y, 5, 0, Math.PI * 2); ctx.fill(); ctx.stroke();
+                        }
+                        
+                      // Store label position for hit detection (before rendering)
+                        let textX = scope.mediaSize.width / 2;
+                        let textY = y;
+                        let labelPos = null;
+                        if (d.text) {
+                            const fontSize = d.fontSize || 14;
+                            const fontStyle = (d.bold ? 'bold ' : '') + (d.italic ? 'italic ' : '');
+                            const font = `${fontStyle}${fontSize}px Inter`;
+                            ctx.font = font;
+                            const metrics = ctx.measureText(d.text);
+                            const labelWidth = metrics.width + 16;
+                            const labelHeight = 24;
+                            const defaultLabelX = scope.mediaSize.width / 2 - labelWidth / 2;
+                            const offset = 10;
+                            const defaultLabelY = d.alignVert === 'top' ? y - 40 : (d.alignVert === 'bottom' ? y + 20 : y - 12);
+                            labelPos = { 
+                                x: defaultLabelX + (d.labelOffset?.x || 0), 
+                                y: defaultLabelY + (d.labelOffset?.y || 0), 
+                                width: labelWidth, 
+                                height: labelHeight 
+                            };
+                            textX = scope.mediaSize.width / 2;
+                            textY = d.alignVert === 'top' ? y - offset : (d.alignVert === 'bottom' ? y + offset : y);
+                        }
+                        
+                        // Render Text if present
+                        if (d.text) {
+                            ctx.save();
+                            ctx.setLineDash([]);
+                            ctx.font = font;
+                            ctx.fillStyle = d.textColor || d.color;
+                            
+                            ctx.textAlign = d.alignHorz || 'center';
+                            ctx.textBaseline = d.alignVert === 'middle' ? 'middle' : (d.alignVert === 'bottom' ? 'top' : 'bottom');
+                            ctx.fillText(d.text, textX, textY);
+                            ctx.restore();
+                        }
+                        
+                        // Store label position for hit detection
+                        if (labelPos) {
+                            d.labelPos = labelPos;
+                        }
+                        
+                        ctx.restore();
                     }
                 } else if (d.type === 'vertical_line') {
                     const x = this.timeToX(d.time);
-                    if (x !== null) {
+                    if (x !== null && x >= 0 && x <= scope.mediaSize.width) {
+                        ctx.save();
+                        ctx.strokeStyle = d.opacity !== undefined ? this.hexToRgba(d.color, d.opacity) : d.color;
+                        ctx.lineWidth = d.width || 2;
+                        if (d.style === 1) ctx.setLineDash([10, 5]);
+                        else if (d.style === 2) ctx.setLineDash([2, 2]);
+                        else ctx.setLineDash([]);
+                        if (isSelected) { ctx.shadowBlur = 5; ctx.shadowColor = d.color; }
                         ctx.beginPath();
                         ctx.moveTo(x, -1000);
                         ctx.lineTo(x, scope.mediaSize.height + 1000);
                         ctx.stroke();
+                        if (isSelected) {
+                            ctx.setLineDash([]);
+                            ctx.fillStyle = '#ffffff';
+                            ctx.beginPath(); ctx.arc(x, 0, 5, 0, Math.PI * 2); ctx.fill(); ctx.stroke();
+                        }
+                        
+                        // Store label position for hit detection (before rendering)
+                        let textX = x;
+                        let textY = 0;
+                        let labelPos = null;
+                        if (d.text) {
+                            const fontSize = d.fontSize || 14;
+                            const fontStyle = (d.bold ? 'bold ' : '') + (d.italic ? 'italic ' : '');
+                            const font = `${fontStyle}${fontSize}px Inter`;
+                            ctx.font = font;
+                            const metrics = ctx.measureText(d.text);
+                            const labelWidth = metrics.width + 16;
+                            const labelHeight = 24;
+                            const offset = 10;
+                            const defaultLabelY = d.alignVert === 'top' ? -50 : (d.alignVert === 'bottom' ? 20 : -12);
+                            labelPos = { 
+                                x: x - labelWidth / 2 + (d.labelOffset?.x || 0), 
+                                y: defaultLabelY + (d.labelOffset?.y || 0), 
+                                width: labelWidth, 
+                                height: labelHeight 
+                            };
+                            textY = d.alignVert === 'top' ? -offset : (d.alignVert === 'bottom' ? offset : 0);
+                        }
+                        
+                        // Render Text if present
+                        if (d.text) {
+                            ctx.save();
+                            ctx.setLineDash([]);
+                            ctx.font = font;
+                            ctx.fillStyle = d.textColor || d.color;
+                            
+                            ctx.textAlign = d.alignHorz || 'center';
+                            ctx.textBaseline = d.alignVert === 'middle' ? 'middle' : (d.alignVert === 'bottom' ? 'top' : 'bottom');
+                            ctx.fillText(d.text, textX, textY);
+                            ctx.restore();
+                        }
+                        
+                        // Store label position for hit detection
+                        if (labelPos) {
+                            d.labelPos = labelPos;
+                        }
+                        
+                        ctx.restore();
                     }
                 } else if (d.type === 'fib_retracement') {
                     const x1 = this.timeToX(d.p1.time);
@@ -829,8 +1103,6 @@ export class DrawingManager {
                         const labelWidth = Math.max(...labelLines.map(l => ctx.measureText(l).width)) + 24;
                         const labelHeight = 65;
                         
-                        // Natural position: Centered horizontally at midpoint, 
-                        // vertically offset from the top/bottom edge.
                         const midX = (x1 + x2) / 2;
                         const topY = Math.min(y1, y2);
                         const bottomY = Math.max(y1, y2);
@@ -881,4 +1153,252 @@ export class DrawingManager {
         ctx.quadraticCurveTo(x, y, x + radius, y);
         ctx.closePath();
     }
+
+    initSettingsPanel() {
+        const panel = document.getElementById('trendlineSettingsPanel');
+        const header = document.getElementById('tlPanelHeader');
+        this.activeTLTab = 'style';
+        
+        // Dragging Logic
+        let isDragging = false;
+        let startX, startY, initialX, initialY;
+
+        header.addEventListener('mousedown', (e) => {
+            isDragging = true;
+            startX = e.clientX;
+            startY = e.clientY;
+            
+            const rect = panel.getBoundingClientRect();
+            initialX = rect.left;
+            initialY = rect.top;
+            
+            panel.classList.remove('left-1/2', '-translate-x-1/2', 'top-14');
+            panel.style.left = initialX + 'px';
+            panel.style.top = initialY + 'px';
+            panel.style.margin = '0';
+            
+            e.preventDefault();
+        });
+
+        window.addEventListener('mousemove', (e) => {
+            if (!isDragging) return;
+            const dx = e.clientX - startX;
+            const dy = e.clientY - startY;
+            panel.style.left = (initialX + dx) + 'px';
+            panel.style.top = (initialY + dy) + 'px';
+        });
+
+        window.addEventListener('mouseup', () => {
+            isDragging = false;
+        });
+
+        // Global functions for HTML event handlers
+        window.toggleTLSettings = (show) => this.toggleSettingsPanel(show);
+        
+        window.switchTLTab = (tab) => {
+            this.activeTLTab = tab;
+            const isLineWithText = this.selectedDrawing && ['trend_line', 'ray', 'rectangle', 'horizontal_line', 'vertical_line'].includes(this.selectedDrawing.type);
+            
+            document.getElementById('tlTabStyle').className = tab === 'style' ? 'flex-1 py-2 text-center text-blue-500 border-b-2 border-blue-500 font-medium' : 'flex-1 py-2 text-center text-gray-400 hover:text-white';
+            
+            const textTab = document.getElementById('tlTabText');
+            if (isLineWithText) {
+                textTab.className = tab === 'text' ? 'flex-1 py-2 text-center text-blue-500 border-b-2 border-blue-500 font-medium' : 'flex-1 py-2 text-center text-gray-400 hover:text-white';
+                textTab.style.display = 'block';
+                document.getElementById('tlContentText').className = tab === 'text' ? 'block' : 'hidden';
+            } else {
+                textTab.style.display = 'none';
+                document.getElementById('tlContentText').className = 'hidden';
+            }
+            
+            document.getElementById('tlContentStyle').className = tab === 'style' ? 'block' : 'hidden';
+            
+            const textPicker = document.getElementById('tlTextColorPicker');
+            if (textPicker) textPicker.classList.add('hidden');
+
+            this.updateSettingsPanelUI();
+        };
+
+        window.setTLThickness = (width) => this.applySettings('width', width);
+        window.setTLStyle = (style) => this.applySettings('style', style);
+        window.toggleTLBold = () => {
+            const current = this.selectedDrawing && ['trend_line', 'ray', 'rectangle', 'horizontal_line', 'vertical_line'].includes(this.selectedDrawing.type) ? this.selectedDrawing.bold : this.defaults.trend_line.bold;
+            this.applySettings('bold', !current);
+        };
+        window.toggleTLItalic = () => {
+            const current = this.selectedDrawing && ['trend_line', 'ray', 'rectangle', 'horizontal_line', 'vertical_line'].includes(this.selectedDrawing.type) ? this.selectedDrawing.italic : this.defaults.trend_line.italic;
+            this.applySettings('italic', !current);
+        };
+
+        // Initialize Color Grids
+        const colors = [
+            '#ffffff', '#e0e0e0', '#bdbdbd', '#9e9e9e', '#757575', '#616161', '#424242', '#212121', '#000000',
+            '#ef5350', '#ff9800', '#ffeb3b', '#66bb6a', '#009688', '#00bcd4', '#2962ff', '#673ab7', '#9c27b0', '#e91e63',
+            '#ffcdd2', '#ffe0b2', '#fff9c4', '#c8e6c9', '#b2dfdb', '#b2ebf2', '#bbdefb', '#d1c4e9', '#e1bee7', '#f8bbd0',
+            '#ef9a9a', '#ffcc80', '#fff59d', '#a5d6a7', '#80cbc4', '#80deea', '#90caf9', '#b39ddb', '#ce93d8', '#f48fb1',
+            '#e57373', '#ffb74d', '#fff176', '#81c784', '#4db6ac', '#4dd0e1', '#64b5f6', '#9575cd', '#ba68c8', '#f06292',
+            '#f44336', '#fb8c00', '#fdd835', '#4caf50', '#00897b', '#00acc1', '#1e88e5', '#5e35b1', '#8e24aa', '#d81b60',
+            '#c62828', '#ef6c00', '#f9a825', '#2e7d32', '#00695c', '#00838f', '#1565c0', '#4527a0', '#6a1b9a', '#ad1457',
+            '#b71c1c', '#e65100', '#f57f17', '#1b5e20', '#004d40', '#006064', '#0d47a1', '#311b92', '#4a148c', '#880e4f'
+        ];
+
+        const styleGrid = document.getElementById('tlColorGrid');
+        const textGrid = document.getElementById('tlTextColorGrid');
+
+        const populateGrid = (gridEl, key, closePopupEl = null) => {
+            if (!gridEl) return;
+            gridEl.innerHTML = '';
+            colors.forEach(color => {
+                const btn = document.createElement('div');
+                btn.className = 'color-swatch';
+                btn.style.backgroundColor = color;
+                btn.onclick = (e) => {
+                    e.stopPropagation();
+                    this.applySettings(key, color);
+                    if (closePopupEl) closePopupEl.classList.add('hidden');
+                };
+                gridEl.appendChild(btn);
+            });
+        };
+
+        populateGrid(styleGrid, 'color');
+        populateGrid(textGrid, 'textColor', document.getElementById('tlTextColorPicker'));
+        
+        const textColorBtn = document.getElementById('tlTextColorBtn');
+        const textPicker = document.getElementById('tlTextColorPicker');
+        if (textColorBtn && textPicker) {
+            textColorBtn.onclick = (e) => {
+                e.stopPropagation();
+                textPicker.classList.toggle('hidden');
+            };
+        }
+
+        // Bind Inputs
+        document.getElementById('tlOpacityInput').addEventListener('input', (e) => {
+            document.getElementById('tlOpacityValue').textContent = e.target.value + '%';
+            this.applySettings('opacity', parseInt(e.target.value));
+        });
+
+        document.getElementById('tlFontSize').addEventListener('change', (e) => {
+            this.applySettings('fontSize', parseInt(e.target.value));
+        });
+
+        document.getElementById('tlTextInput').addEventListener('input', (e) => {
+            this.applySettings('text', e.target.value);
+        });
+        
+        document.getElementById('tlAlignVert').addEventListener('change', (e) => {
+            this.applySettings('alignVert', e.target.value);
+        });
+        
+        document.getElementById('tlAlignHorz').addEventListener('change', (e) => {
+            this.applySettings('alignHorz', e.target.value);
+        });
+
+        // Close on click outside
+        document.addEventListener('mousedown', (e) => {
+            const panel = document.getElementById('trendlineSettingsPanel');
+            const toolbar = document.getElementById('drawingToolbar');
+            const textPicker = document.getElementById('tlTextColorPicker');
+            
+            if (textPicker && !textPicker.classList.contains('hidden') && !textPicker.contains(e.target) && e.target !== document.getElementById('tlTextColorBtn')) {
+                textPicker.classList.add('hidden');
+            }
+
+            if (panel && !panel.classList.contains('hidden')) {
+                if (!panel.contains(e.target) && !toolbar.contains(e.target)) {
+                    panel.classList.add('hidden');
+                }
+            }
+        });
+    }
+
+    toggleSettingsPanel(show = true) {
+        const panel = document.getElementById('trendlineSettingsPanel');
+        if (!panel) return;
+        
+        if (show) {
+            panel.classList.remove('hidden');
+            this.updateSettingsPanelUI();
+        } else {
+            panel.classList.add('hidden');
+        }
+    }
+
+    updateSettingsPanelUI() {
+        const settings = this.selectedDrawing || this.defaults[this.selectedDrawing ? this.selectedDrawing.type : 'trend_line'];
+        
+        document.querySelectorAll('#tlColorGrid .color-swatch').forEach(el => {
+            if (el.style.backgroundColor === settings.color) el.classList.add('active'); 
+            else el.classList.remove('active');
+        });
+
+        document.getElementById('tlOpacityInput').value = settings.opacity !== undefined ? settings.opacity : 100;
+        document.getElementById('tlOpacityValue').textContent = (settings.opacity !== undefined ? settings.opacity : 100) + '%';
+        
+        document.querySelectorAll('.tl-thickness-btn').forEach(btn => {
+            btn.setAttribute('data-active', parseInt(btn.dataset.thickness) === settings.width);
+        });
+
+        document.querySelectorAll('.tl-style-btn').forEach(btn => {
+            btn.setAttribute('data-active', parseInt(btn.dataset.style) === settings.style);
+        });
+
+        const isLineWithText = this.selectedDrawing && ['trend_line', 'ray', 'rectangle'].includes(this.selectedDrawing.type);
+        
+        const textColorBtn = document.getElementById('tlTextColorBtn');
+        const textPicker = document.getElementById('tlTextColorPicker');
+        const fontInput = document.getElementById('tlFontSize');
+        const textInput = document.getElementById('tlTextInput');
+        const alignVert = document.getElementById('tlAlignVert');
+        const alignHorz = document.getElementById('tlAlignHorz');
+        const boldBtn = document.getElementById('tlBoldBtn');
+        const italicBtn = document.getElementById('tlItalicBtn');
+        
+        if (isLineWithText) {
+            if (textColorBtn && textPicker) {
+                textColorBtn.style.backgroundColor = settings.textColor || settings.color;
+                textPicker.classList.remove('hidden');
+            }
+            fontInput.value = settings.fontSize || 14;
+            textInput.value = settings.text || '';
+            boldBtn.setAttribute('data-active', !!settings.bold);
+            italicBtn.setAttribute('data-active', !!settings.italic);
+            alignVert.value = settings.alignVert || 'top';
+            alignHorz.value = settings.alignHorz || 'left';
+        } else {
+            if (textPicker) textPicker.classList.add('hidden');
+        }
+    }
+
+    applySettings(key, value) {
+        if (this.selectedDrawing) {
+            if (key === 'bold' || key === 'italic' || key === 'fontSize' || key === 'text' || key === 'textColor' || key === 'alignVert' || key === 'alignHorz') {
+                const isLineWithText = ['trend_line', 'ray', 'rectangle'].includes(this.selectedDrawing.type);
+                if (!isLineWithText) return;
+                this.selectedDrawing[key] = value;
+            } else {
+                this.selectedDrawing[key] = value;
+            }
+            this.update();
+        } else {
+            const drawingType = this.selectedDrawing ? this.selectedDrawing.type : 'trend_line';
+            if (key === 'bold' || key === 'italic' || key === 'fontSize' || key === 'text' || key === 'textColor' || key === 'alignVert' || key === 'alignHorz') {
+                if (drawingType === 'trend_line' || drawingType === 'ray' || drawingType === 'rectangle') {
+                    this.defaults.trend_line[key] = value;
+                }
+            } else {
+                if (drawingType === 'trend_line' || drawingType === 'ray' || drawingType === 'rectangle') {
+                    this.defaults.trend_line[key] = value;
+                } else if (drawingType === 'horizontal_line') {
+                    this.defaults.horizontal_line[key] = value;
+                } else if (drawingType === 'vertical_line') {
+                    this.defaults.vertical_line[key] = value;
+                } else {
+                    this.defaults.trend_line[key] = value;
+                }
+            }
+        }
+        this.updateSettingsPanelUI();
+    }
 }