diff --git a/lib/src/deriv_chart/chart/main_chart.dart b/lib/src/deriv_chart/chart/main_chart.dart
index 54c050867..e729aef57 100644
--- a/lib/src/deriv_chart/chart/main_chart.dart
+++ b/lib/src/deriv_chart/chart/main_chart.dart
@@ -399,6 +399,11 @@ class _ChartImplementationState extends BasicChartState<MainChart> {
 
   @override
   Widget build(BuildContext context) => LayoutBuilder(
+        // Force remount when markerSeries changes.
+        // LayoutBuilder only re-invokes its builder on constraint changes;
+        // without a key that tracks markerSeries identity, the old
+        // MarkerArea subtree persists after trade-type switches.
+        key: ObjectKey(widget.markerSeries),
         builder: (BuildContext context, BoxConstraints constraints) {
           final XAxisModel xAxis = context.watch<XAxisModel>();
 
@@ -579,17 +584,20 @@ class _ChartImplementationState extends BasicChartState<MainChart> {
         ),
       );
 
-  Widget _buildMarkerArea() => MultipleAnimatedBuilder(
-        animations: <Listenable>[
-          currentTickAnimation,
-          topBoundQuoteAnimationController,
-          bottomBoundQuoteAnimationController
-        ],
-        builder: (BuildContext context, _) => MarkerArea(
-          markerSeries: widget.markerSeries!,
-          quoteToCanvasY: chartQuoteToCanvasY,
-          animationInfo: AnimationInfo(
-            currentTickPercent: currentTickAnimation.value,
+  Widget _buildMarkerArea() => KeyedSubtree(
+        key: ObjectKey(widget.markerSeries),
+        child: MultipleAnimatedBuilder(
+          animations: <Listenable>[
+            currentTickAnimation,
+            topBoundQuoteAnimationController,
+            bottomBoundQuoteAnimationController
+          ],
+          builder: (BuildContext context, _) => MarkerArea(
+            markerSeries: widget.markerSeries!,
+            quoteToCanvasY: chartQuoteToCanvasY,
+            animationInfo: AnimationInfo(
+              currentTickPercent: currentTickAnimation.value,
+            ),
           ),
         ),
       );