diff --git a/Assets/XCharts/CHANGELOG.md b/Assets/XCharts/CHANGELOG.md
index 3ad165cc..b30e2e3a 100644
--- a/Assets/XCharts/CHANGELOG.md
+++ b/Assets/XCharts/CHANGELOG.md
@@ -1,6 +1,8 @@
 
 # 更新日志
 
+* (2020.07.16) Fixed a problem with `Tooltip` that would also show up if it was blocked on top. #74  
+               修复`Tooltip`在上层有遮挡还会显示的问题#74
 * (2020.07.08) 优化`Scatter`类型`Serie`支持`Log`轴#70
 * (2020.07.07) 修复`SerieLabel`位置错乱的问题
 * (2020.07.07) 增加`Tooltip`的`offset`参数配置偏移
diff --git a/Assets/XCharts/Runtime/API/BaseGraph_API.cs b/Assets/XCharts/Runtime/API/BaseGraph_API.cs
index 359c3e0f..22e4015f 100644
--- a/Assets/XCharts/Runtime/API/BaseGraph_API.cs
+++ b/Assets/XCharts/Runtime/API/BaseGraph_API.cs
@@ -45,10 +45,15 @@ namespace XCharts
         public Rect graphRect { get { return m_GraphRect; } }
         /// <summary>
         /// The postion of pointer.
-        /// 鼠标位置
+        /// 鼠标位置。
         /// </summary>
         public Vector2 pointerPos { get; protected set; }
         /// <summary>
+        /// Whether the mouse pointer is in the chart.
+        /// 鼠标是否在图表内。
+        /// </summary>
+        public bool isPointerInChart { get; protected set; }
+        /// <summary>
         /// 警告信息。
         /// </summary>
         public string warningInfo { get; protected set; }
diff --git a/Assets/XCharts/Runtime/Internal/BaseChart.cs b/Assets/XCharts/Runtime/Internal/BaseChart.cs
index b55f0262..fdbfb046 100644
--- a/Assets/XCharts/Runtime/Internal/BaseChart.cs
+++ b/Assets/XCharts/Runtime/Internal/BaseChart.cs
@@ -543,7 +543,7 @@ namespace XCharts
 
         private void CheckTooltip()
         {
-            if (!m_Tooltip.show || !m_Tooltip.runtimeInited)
+            if (!isPointerInChart || !m_Tooltip.show || !m_Tooltip.runtimeInited)
             {
                 if (m_Tooltip.IsActive())
                 {
diff --git a/Assets/XCharts/Runtime/Internal/BaseGraphic.cs b/Assets/XCharts/Runtime/Internal/BaseGraphic.cs
index 6ab228d4..82fe8e5d 100644
--- a/Assets/XCharts/Runtime/Internal/BaseGraphic.cs
+++ b/Assets/XCharts/Runtime/Internal/BaseGraphic.cs
@@ -160,6 +160,7 @@ namespace XCharts
             if (m_ForceOpenRaycastTarget) raycastTarget = true;
             if (IsNeedCheckPointerPos())
             {
+                raycastTarget = true;
                 if (canvas == null) return;
                 Vector2 local;
                 var cam = canvas.renderMode == RenderMode.ScreenSpaceOverlay ? null : canvas.worldCamera;
@@ -173,6 +174,10 @@ namespace XCharts
                     pointerPos = local;
                 }
             }
+            else
+            {
+                raycastTarget = false;
+            }
         }
 
         protected virtual bool IsNeedCheckPointerPos()
@@ -215,6 +220,7 @@ namespace XCharts
 
         public virtual void OnPointerClick(PointerEventData eventData)
         {
+            Debug.LogError("click");
             if (m_OnPointerClick != null) m_OnPointerClick(this, eventData);
         }
 
@@ -230,11 +236,13 @@ namespace XCharts
 
         public virtual void OnPointerEnter(PointerEventData eventData)
         {
+            isPointerInChart = true;
             if (m_OnPointerEnter != null) m_OnPointerEnter(this, eventData);
         }
 
         public virtual void OnPointerExit(PointerEventData eventData)
         {
+            isPointerInChart = false;
             if (m_OnPointerExit != null) m_OnPointerExit(this, eventData);
         }