diff --git a/lib/plugin/pl_player/view.dart b/lib/plugin/pl_player/view.dart
index 5d5c8817..c53de571 100644
--- a/lib/plugin/pl_player/view.dart
+++ b/lib/plugin/pl_player/view.dart
@@ -1538,7 +1538,7 @@ Widget buildDmChart(
           gridData: const FlGridData(show: false),
           borderData: FlBorderData(show: false),
           minX: 0,
-          maxX: plPlayerController.dmTrend.length.toDouble(),
+          maxX: (plPlayerController.dmTrend.length - 1).toDouble(),
           minY: 0,
           maxY: plPlayerController.dmTrend
               .reduce((a, b) => a > b ? a : b)