diff --git a/js/ui/chart.js b/js/ui/chart.js
index 5d8cbe4..fe849f5 100644
--- a/js/ui/chart.js
+++ b/js/ui/chart.js
@@ -511,14 +511,21 @@ constructor() {
         };
         
         btnAutoScale.addEventListener('click', () => {
+            console.log('[AutoScale] Button clicked');
+            console.log('[AutoScale] candleSeries:', this.candleSeries);
+            console.log('[AutoScale] priceScale():', this.candleSeries?.priceScale());
+            
             this.priceScaleState.autoScale = !this.priceScaleState.autoScale;
             btnAutoScale.classList.toggle('active', this.priceScaleState.autoScale);
             
-            this.candleSeries.priceScale().applyOptions({
-                autoScale: this.priceScaleState.autoScale
-            });
-            
-            console.log('Auto Scale:', this.priceScaleState.autoScale ? 'ON' : 'OFF');
+            try {
+                this.candleSeries.priceScale().applyOptions({
+                    autoScale: this.priceScaleState.autoScale
+                });
+                console.log('[AutoScale] Success:', this.priceScaleState.autoScale ? 'ON' : 'OFF');
+            } catch (e) {
+                console.error('[AutoScale] Error:', e.message);
+            }
         });
         
         btnLogScale.addEventListener('click', () => {