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 9bdad374..81c5a803 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
@@ -57,7 +57,8 @@ class _KlineChartWidgetState extends State<KlineChartWidget> {
   static const double _maxCandleWidth = 30.0;
 
   // 指标选择
-  int _selectedMainIndicator = 0; // 0: MA, 1: EMA, 2: BOLL
+  // -1: 无（不显示主图指标）, 0: MA, 1: EMA, 2: BOLL
+  int _selectedMainIndicator = -1;
   int _selectedSubIndicator = 0; // 0: MACD, 1: KDJ, 2: RSI
 
   // 十字线