diff --git a/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart b/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
index 3c2150cb..ad7d0568 100644
--- a/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
+++ b/frontend/mining-app/lib/presentation/widgets/kline_chart/kline_chart_widget.dart
@@ -537,12 +537,17 @@ class _KlineChartWidgetState extends State<KlineChartWidget> {
         _userHasPanned = true;  // 缩放后也标记为已操作
       } else if (_startFocalPoint != null) {
         // 单指平移
+        // dx > 0 向右滑（看更早历史），dx < 0 向左滑（看更新数据）
         final dx = details.focalPoint.dx - _startFocalPoint!.dx;
         // 最大滚动位置：让最新K线在屏幕中心
         final int halfScreenCount = (_chartWidth / 2 / _candleWidth).ceil();
         final double maxScroll = math.max(0.0, (widget.klines.length - halfScreenCount) * _candleWidth);
+        // 向右滑 dx>0，scrollX 减小，显示更早的数据
         _scrollX = (_startScrollX - dx).clamp(0.0, maxScroll);
         _userHasPanned = true;
+
+        // DEBUG: 打印滚动信息
+        debugPrint('Pan: dx=$dx, scrollX=$_scrollX, maxScroll=$maxScroll, startIndex=${(_scrollX / _candleWidth).floor()}');
       }
     });
   }