diff --git a/lib/src/main/java/com/github/wangyiqian/stockchart/StockChart.kt b/lib/src/main/java/com/github/wangyiqian/stockchart/StockChart.kt
index 049bd0c..451cc82 100644
--- a/lib/src/main/java/com/github/wangyiqian/stockchart/StockChart.kt
+++ b/lib/src/main/java/com/github/wangyiqian/stockchart/StockChart.kt
@@ -350,9 +350,7 @@ class StockChart @JvmOverloads constructor(context: Context, attrs: AttributeSet
                 childCharts.forEach { childChart ->
                     val childChartX = x - childChart.view().left
                     val childChartY = y - childChart.view().top
-                    tmp2FloatArray[0] = childChartX
-                    tmp2FloatArray[1] = childChartY
-                    childChart.mapPointsReal2Value(tmp2FloatArray)
+                    childChart.getHighlightValue(childChartX, childChartY, tmp2FloatArray)
                     val valueX = tmp2FloatArray[0]
                     val valueY = tmp2FloatArray[1]
                     var highlight = highlightMap[childChart]
diff --git a/lib/src/main/java/com/github/wangyiqian/stockchart/childchart/base/IChildChart.kt b/lib/src/main/java/com/github/wangyiqian/stockchart/childchart/base/IChildChart.kt
index 5154fa1..a677e1b 100644
--- a/lib/src/main/java/com/github/wangyiqian/stockchart/childchart/base/IChildChart.kt
+++ b/lib/src/main/java/com/github/wangyiqian/stockchart/childchart/base/IChildChart.kt
@@ -91,4 +91,10 @@ interface IChildChart {
      * 点击
      */
     fun onTap(event: GestureEvent)
+
+    fun getHighlightValue(highlightX: Float, highlightY: Float, highlightValue: FloatArray) {
+        highlightValue[0] = highlightX
+        highlightValue[1] = highlightY
+        mapPointsReal2Value(highlightValue)
+    }
 }
\ No newline at end of file
diff --git a/samples/build.gradle b/samples/build.gradle
index d737bb8..c64cc76 100644
--- a/samples/build.gradle
+++ b/samples/build.gradle
@@ -70,6 +70,6 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
     implementation 'com.google.android:flexbox:2.0.1'
 
-//    implementation project(':lib')
-    implementation 'com.github.wangyiqian:StockChart:1.0.17'
+    implementation project(':lib')
+//    implementation 'com.github.wangyiqian:StockChart:1.0.17'
 }
\ No newline at end of file