fix: indicator panel overlap and performance optimizations

js/ui/chart.js

@@ -136,6 +136,19 @@ function formatDate(timestamp) {
     return TimezoneConfig.formatDate(timestamp);
 }
 
+function throttle(func, limit) {
+    let inThrottle;
+    return function() {
+        const args = arguments;
+        const context = this;
+        if (!inThrottle) {
+            func.apply(context, args);
+            inThrottle = true;
+            setTimeout(() => inThrottle = false, limit);
+        }
+    }
+}
+
 export class TradingDashboard {
 constructor() {
         this.chart = null;
@@ -157,6 +170,9 @@ constructor() {
         this.dailyMAData = new Map(); // timestamp -> { ma44, ma125, price }
         this.currentMouseTime = null;
         
+        // Throttled versions of heavy functions
+        this.throttledOnVisibleRangeChange = throttle(this.onVisibleRangeChange.bind(this), 150);
+        
         this.init();
     }
 
@@ -756,7 +772,6 @@ onVisibleRangeChange() {
             console.log(`[VisibleRange] Chart data (${data.length}) vs dataset (${allData?.length || 0}) differ, redrawing indicators...`);
         }
         
-        window.drawIndicatorsOnChart?.();
         this.loadSignals().catch(e => console.error('Error loading signals:', e));
     }