diff --git a/lib/views/home/statistic/statistic_details/statistic_details.dart b/lib/views/home/statistic/statistic_details/statistic_details.dart
index bc7fdcf..b8dd16f 100644
--- a/lib/views/home/statistic/statistic_details/statistic_details.dart
+++ b/lib/views/home/statistic/statistic_details/statistic_details.dart
@@ -108,8 +108,8 @@ class _StatisticDetailsState extends State<StatisticDetails> {
                               ),
                               minX: 0,
                               maxX: state.datas.length.toDouble() - 1,
-                              maxY: state.maxValue * 1.001,
-                              minY: state.minValue,
+                              maxY: state.maxValue * 1.02,
+                              minY: state.minValue! * 0.98,
                               gridData: FlGridData(show: false),
                               borderData: FlBorderData(show: false),
                               titlesData: FlTitlesData(show: false),
diff --git a/lib/views/home/statistic/statistic_details/statistic_details_state.dart b/lib/views/home/statistic/statistic_details/statistic_details_state.dart
index 9d22e04..a87ef8c 100644
--- a/lib/views/home/statistic/statistic_details/statistic_details_state.dart
+++ b/lib/views/home/statistic/statistic_details/statistic_details_state.dart
@@ -82,14 +82,6 @@ class StatisticDetailsState extends CoreProvier {
       }
       for (var i = 0; i < result.length; i++) {
         datas.add(Data.fromList(result[i]));
-        final highest = _stringToDouble(datas.last.h);
-        final lowest = _stringToDouble(datas.last.l);
-        if (highest > maxValue) {
-          maxValue = highest;
-        }
-        if (lowest < (minValue ?? _stringToDouble(datas.last.p))) {
-          minValue = lowest;
-        }
       }
       if (currentDateRangeId != 0 && currentDateRangeId != 1) {
         final grouped =
@@ -99,8 +91,8 @@ class StatisticDetailsState extends CoreProvier {
           datas.add(
             Data(
               p: _average(value),
-              h: maxValue.toString(),
-              l: minValue.toString(),
+              h: '',
+              l: '',
               d: '',
               dp: 0,
               dt: '',
@@ -112,6 +104,15 @@ class StatisticDetailsState extends CoreProvier {
           );
         });
       }
+      for (var i = 0; i < datas.length; i++) {
+        final current = _stringToDouble(datas[i].p);
+        if (maxValue < current) {
+          maxValue = current;
+        }
+        if (minValue == null || minValue! > current) {
+          minValue = current;
+        }
+      }
       getRelatedContents();
       datas.replaceRange(0, datas.length, datas.reversed);
       chartState = AppState.idle;