diff --git a/Scripts/UI/BarChart.cs b/Scripts/UI/BarChart.cs
index 9a965cde..edc317d2 100644
--- a/Scripts/UI/BarChart.cs
+++ b/Scripts/UI/BarChart.cs
@@ -33,7 +33,7 @@ namespace XCharts
             {
                 var stackSeries = m_Series.GetStackSeries();
                 int seriesCount = stackSeries.Count;
-                float scaleWid = m_YAxis.GetDataWidth(coordinateHig,m_DataZoom);
+                float scaleWid = m_YAxis.GetDataWidth(coordinateHig, m_DataZoom);
                 float barWid = m_Bar.barWidth > 1 ? m_Bar.barWidth : scaleWid * m_Bar.barWidth;
                 float offset = m_Bar.inSameBar ?
                     (scaleWid - barWid - m_Bar.space * (seriesCount - 1)) / 2 :
@@ -61,7 +61,8 @@ namespace XCharts
                             float pX = seriesCurrHig[i] + zeroX + m_Coordinate.tickness;
                             float pY = coordinateY + i * scaleWid;
                             if (!m_YAxis.boundaryGap) pY -= scaleWid / 2;
-                            float barHig = value / (maxValue - minValue) * coordinateWid;
+                            float barHig = (minValue > 0 ? value - minValue : value)
+                                / (maxValue - minValue) * coordinateWid;
                             float space = m_Bar.inSameBar ? offset :
                                 offset + j * (barWid + m_Bar.space);
                             seriesCurrHig[i] += barHig;
@@ -141,7 +142,8 @@ namespace XCharts
                             float pX = zeroX + i * scaleWid;
                             if (!m_XAxis.boundaryGap) pX -= scaleWid / 2;
                             float pY = seriesCurrHig[i] + zeroY + m_Coordinate.tickness;
-                            float barHig = value / (maxValue - minValue) * coordinateHig;
+                            float barHig = (minValue > 0 ? value - minValue : value)
+                                / (maxValue - minValue) * coordinateHig;
                             seriesCurrHig[i] += barHig;
                             float space = m_Bar.inSameBar ? offset :
                                 offset + j * (barWid + m_Bar.space);
diff --git a/Scripts/UI/Internal/CoordinateChart.cs b/Scripts/UI/Internal/CoordinateChart.cs
index ec89771f..dbb28605 100644
--- a/Scripts/UI/Internal/CoordinateChart.cs
+++ b/Scripts/UI/Internal/CoordinateChart.cs
@@ -376,58 +376,39 @@ namespace XCharts
             {
                 m_Series.GetMinMaxValue(m_DataZoom, out tempMinValue, out tempMaxValue);
             }
-            if (m_XAxis.type == Axis.AxisType.Value)
+            Axis axis;
+            if (m_XAxis.type == Axis.AxisType.Value) axis = m_XAxis;
+            else axis = m_YAxis;
+            switch (axis.minMaxType)
             {
-                switch (m_XAxis.minMaxType)
-                {
-                    case Axis.AxisMinMaxType.Default:
-                        if (tempMinValue > 0 && tempMaxValue > 0)
-                        {
-                            tempMinValue = 0;
-                            tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
-                        }
-                        else if (tempMinValue < 0 && tempMaxValue < 0)
-                        {
-                            tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
-                            tempMaxValue = 0;
-                        }
-                        break;
-                    case Axis.AxisMinMaxType.MinMax:
+                case Axis.AxisMinMaxType.Default:
+                    if (tempMinValue > 0 && tempMaxValue > 0)
+                    {
+                        tempMinValue = 0;
+                        tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
+                    }
+                    else if (tempMinValue < 0 && tempMaxValue < 0)
+                    {
+                        tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
+                        tempMaxValue = 0;
+                    }
+                    else
+                    {
                         tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
                         tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
-                        break;
-                    case Axis.AxisMinMaxType.Custom:
-                        if (m_XAxis.min != 0) tempMinValue = m_XAxis.min;
-                        if (m_XAxis.max != 0) tempMaxValue = m_XAxis.max;
-                        break;
-                }
-            }
-            else if (m_YAxis.type == Axis.AxisType.Value)
-            {
-                switch (m_YAxis.minMaxType)
-                {
-                    case Axis.AxisMinMaxType.Default:
-                        if (tempMinValue > 0 && tempMaxValue > 0)
-                        {
-                            tempMinValue = 0;
-                            tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
-                        }
-                        else if (tempMinValue < 0 && tempMaxValue < 0)
-                        {
-                            tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
-                            tempMaxValue = 0;
-                        }
-                        break;
-                    case Axis.AxisMinMaxType.MinMax:
-                        tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
-                        tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
-                        break;
-                    case Axis.AxisMinMaxType.Custom:
-                        if (m_YAxis.min != 0) tempMinValue = m_YAxis.min;
-                        if (m_YAxis.max != 0) tempMaxValue = m_YAxis.max;
-                        break;
-                }
-
+                    }
+                    break;
+                case Axis.AxisMinMaxType.MinMax:
+                    tempMinValue = ChartHelper.GetMinDivisibleValue(tempMinValue);
+                    tempMaxValue = ChartHelper.GetMaxDivisibleValue(tempMaxValue);
+                    break;
+                case Axis.AxisMinMaxType.Custom:
+                    if (axis.min != 0 || axis.max != 0)
+                    {
+                        tempMinValue = axis.min;
+                        tempMaxValue = axis.max;
+                    }
+                    break;
             }
             if (tempMinValue != minValue || tempMaxValue != maxValue)
             {
@@ -436,12 +417,14 @@ namespace XCharts
                 if (m_XAxis.type == Axis.AxisType.Value)
                 {
                     m_ZeroXOffset = minValue > 0 ? 0 :
+                        maxValue < 0 ? coordinateWid :
                         Mathf.Abs(minValue) * (coordinateWid / (Mathf.Abs(minValue) + Mathf.Abs(maxValue)));
                     OnXMaxValueChanged();
                 }
                 else if (m_YAxis.type == Axis.AxisType.Value)
                 {
                     m_ZeroYOffset = minValue > 0 ? 0 :
+                        maxValue < 0 ? coordinateHig :
                         Mathf.Abs(minValue) * (coordinateHig / (Mathf.Abs(minValue) + Mathf.Abs(maxValue)));
                     OnYMaxValueChanged();
                 }
@@ -468,6 +451,8 @@ namespace XCharts
         protected override void OnSizeChanged()
         {
             base.OnSizeChanged();
+            minValue = 0;
+            maxValue = 100;
             InitSplitX();
             InitSplitY();
         }
diff --git a/Scripts/UI/LineChart.cs b/Scripts/UI/LineChart.cs
index d0205e2c..d19c6c42 100644
--- a/Scripts/UI/LineChart.cs
+++ b/Scripts/UI/LineChart.cs
@@ -90,9 +90,8 @@ namespace XCharts
                         }
                         float value = serieData[i];
                         float pX = startX + i * scaleWid;
-                        float pY = seriesCurrHig[i] + zeroY + m_Coordinate.tickness;
-                        float dataHig = value / (maxValue - minValue) * coordinateHig;
-
+                        float pY = seriesCurrHig[i] + coordinateY + m_Coordinate.tickness;
+                        float dataHig = (value - minValue) / (maxValue - minValue) * coordinateHig;
                         np = new Vector3(pX, pY + dataHig);
 
                         if (i > 0)
@@ -329,8 +328,8 @@ namespace XCharts
                         }
                         float value = serie.data[i];
                         float pY = startY + i * scaleWid;
-                        float pX = seriesCurrHig[i] + zeroX + m_Coordinate.tickness;
-                        float dataHig = value / (maxValue - minValue) * coordinateWid;
+                        float pX = seriesCurrHig[i] + coordinateX + m_Coordinate.tickness;
+                        float dataHig = (value - minValue) / (maxValue - minValue) * coordinateWid;
                         np = new Vector3(pX + dataHig, pY);
 
                         if (i > 0)