From 396487b5438c45607133a8223de93fcf0449df29 Mon Sep 17 00:00:00 2001
From: behnam-deriv <133759298+behnam-deriv@users.noreply.github.com>
Date: Mon, 9 Mar 2026 19:20:54 +0800
Subject: [PATCH] fix: quote bound animation for disjoint price range

---
 lib/src/deriv_chart/chart/basic_chart.dart | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/lib/src/deriv_chart/chart/basic_chart.dart b/lib/src/deriv_chart/chart/basic_chart.dart
index db7737ee2..637f72cad 100644
--- a/lib/src/deriv_chart/chart/basic_chart.dart
+++ b/lib/src/deriv_chart/chart/basic_chart.dart
@@ -322,14 +322,31 @@ class BasicChartState<T extends BasicChart> extends State<T>
       maxQuote += 2;
     }
 
-    if (!minQuote.isNaN && minQuote != bottomBoundQuoteTarget) {
+    if (minQuote.isNaN || maxQuote.isNaN) {
+      return;
+    }
+
+    // Snap bounds and skip tick animation when switching to a market with a
+    // disjoint price range, to avoid a long vertical-line artifact.
+    final bool rangeDisjoint =
+        maxQuote < bottomBoundQuoteTarget || minQuote > topBoundQuoteTarget;
+    if (rangeDisjoint) {
+      bottomBoundQuoteTarget = minQuote;
+      bottomBoundQuoteAnimationController.value = minQuote;
+      topBoundQuoteTarget = maxQuote;
+      topBoundQuoteAnimationController.value = maxQuote;
+      completeCurrentTickAnimation();
+      return;
+    }
+
+    if (minQuote != bottomBoundQuoteTarget) {
       bottomBoundQuoteTarget = minQuote;
       bottomBoundQuoteAnimationController.animateTo(
         bottomBoundQuoteTarget,
         curve: Curves.easeOut,
       );
     }
-    if (!maxQuote.isNaN && maxQuote != topBoundQuoteTarget) {
+    if (maxQuote != topBoundQuoteTarget) {
       topBoundQuoteTarget = maxQuote;
       topBoundQuoteAnimationController.animateTo(
         topBoundQuoteTarget,