diff --git a/Scripts/UI/Internal/BaseChart.cs b/Scripts/UI/Internal/BaseChart.cs
index 60829348..0810d957 100644
--- a/Scripts/UI/Internal/BaseChart.cs
+++ b/Scripts/UI/Internal/BaseChart.cs
@@ -6,6 +6,12 @@ using UnityEngine.EventSystems;
 
 namespace XCharts
 {
+    public enum Orient
+    {
+        Horizonal,
+        Vertical
+    }
+
     public class BaseChart : MaskableGraphic
     {
         private static readonly string s_TitleObjectName = "title";
@@ -331,12 +337,14 @@ namespace XCharts
                 Input.mousePosition, null, out local))
             {
                 m_Tooltip.SetActive(false);
+                RefreshChart();
                 return;
             }
             if (local.x < 0 || local.x > chartWidth ||
                 local.y < 0 || local.y > chartHeight)
             {
                 m_Tooltip.SetActive(false);
+                RefreshChart();
                 return;
             }
             m_Tooltip.pointerPos = local;
diff --git a/Scripts/UI/Internal/CoordinateChart.cs b/Scripts/UI/Internal/CoordinateChart.cs
index 43d8fb67..6988be91 100644
--- a/Scripts/UI/Internal/CoordinateChart.cs
+++ b/Scripts/UI/Internal/CoordinateChart.cs
@@ -70,8 +70,8 @@ namespace XCharts
 
         protected override void CheckTootipArea(Vector2 local)
         {
-            if (local.x < zeroX || local.x > zeroX + coordinateWid ||
-                local.y < zeroY || local.y > zeroY + coordinateHig)
+            if (local.x < coordinateX || local.x > coordinateX + coordinateWid ||
+                local.y < coordinateY || local.y > coordinateY + coordinateHig)
             {
                 m_Tooltip.dataIndex = 0;
                 RefreshTooltip();
diff --git a/Scripts/UI/Internal/Legend.cs b/Scripts/UI/Internal/Legend.cs
index 168f4bbd..64557d40 100644
--- a/Scripts/UI/Internal/Legend.cs
+++ b/Scripts/UI/Internal/Legend.cs
@@ -8,12 +8,6 @@ namespace XCharts
     [System.Serializable]
     public class Legend : JsonDataSupport, IPropertyChanged, IEquatable<Legend>
     {
-        public enum Orient
-        {
-            Horizonal,
-            Vertical
-        }
-
         [SerializeField] private bool m_Show = true;
         [SerializeField] private Orient m_Orient = Orient.Horizonal;
         [SerializeField] private Location m_Location = Location.defaultRight;
diff --git a/Scripts/UI/Internal/Tooltip.cs b/Scripts/UI/Internal/Tooltip.cs
index 78cbcbfb..b5dea368 100644
--- a/Scripts/UI/Internal/Tooltip.cs
+++ b/Scripts/UI/Internal/Tooltip.cs
@@ -119,7 +119,8 @@ namespace XCharts
 
         public void SetActive(bool flag)
         {
-            if(m_GameObject && m_GameObject.activeInHierarchy != flag)
+            lastDataIndex = 0;
+            if (m_GameObject && m_GameObject.activeInHierarchy != flag)
                 m_GameObject.SetActive(flag);
         }