diff --git a/DataHandler.cs b/DataHandler.cs
index cddce3d..070b446 100644
--- a/DataHandler.cs
+++ b/DataHandler.cs
@@ -58,6 +58,7 @@ namespace friction
 
 		string m_strCurSpring = "";
 		string m_strCurTable = "";
+		string m_strPrevTable = "";
 
 		List<string> m_ColumnsNames = new List<string>();
 		List<string> m_ActiveColumns = new List<string>();
@@ -144,6 +145,7 @@ namespace friction
 
 			m_TableList = (from r in m_Data.AsEnumerable()
 						   select r[Config.COLUMN_NAME.TABLE]).Distinct().Cast<string>().ToList();
+			m_strPrevTable = m_TableList[0];
 
 			m_ColumnsNames = (from c in m_Data.Columns.Cast<DataColumn>()
 						 select c.ColumnName).ToList<string>();
@@ -172,6 +174,7 @@ namespace friction
 		public void SetSelectedMaterial(string strSpring, string strTable)
 		{
 			m_strCurSpring = strSpring;
+			m_strPrevTable = m_strCurTable;
 			m_strCurTable = strTable;
 		}
 
@@ -282,7 +285,7 @@ namespace friction
 			string strQuery = string.Format("[{0}]='{1}' and [{2}]='{3}'", Config.COLUMN_NAME.SPRING, strSpring, Config.COLUMN_NAME.TABLE, strTable);
 			DataRow[] rows = m_Data.Select(strQuery);
 
-			if(rows.Length > 0)
+			if (rows.Length > 0)
 			{
 				result.m_iCnt = rows.Length;
 				result.m_fAvgRPN = rows.Average(r => (float)r[Config.COLUMN_NAME.RPN]);
@@ -299,8 +302,6 @@ namespace friction
 
 			}
 
-			
-
 			return result;
 		}
 		#endregion
@@ -327,6 +328,11 @@ namespace friction
 			return m_SpringList;
 		}
 
+		public string GetPrevTable()
+		{
+			return m_strPrevTable;
+		}
+
 		public List<string> GetTableList()
 		{
 			return m_TableList;
diff --git a/MainForm.cs b/MainForm.cs
index 38a044b..bd9d542 100644
--- a/MainForm.cs
+++ b/MainForm.cs
@@ -197,7 +197,7 @@ namespace friction
 		private void trendGraphToolStripMenuItem_Click(object sender, EventArgs e)
 		{
 			if (m_DataHandler.GetCurTable() == "All")
-				OnApplyData(this, m_DataHandler.GetCurSpring(), m_DataHandler.GetTableList()[0]);
+				OnApplyData(this, m_DataHandler.GetCurSpring(), m_DataHandler.GetPrevTable());
 
 			OpenPanel(m_TrendGraphPanel);
 			m_TrendGraphPanel.UpdateGraph();
@@ -232,7 +232,7 @@ namespace friction
 			if(m_DataHandler.GetCurTable() != "" && m_DataHandler.GetCurTable() != "All")
 			{
 				if (m_DataHandler.GetCurTable() == "All")
-					OnApplyData(this, m_DataHandler.GetCurSpring(), m_DataHandler.GetTableList()[0]);
+					OnApplyData(this, m_DataHandler.GetCurSpring(), m_DataHandler.GetPrevTable());
 
 				OpenPanel(m_TrendGraphPanel);
 				m_TrendGraphPanel.CopyChart(PanelTrendGraph.GRAPH_TYPE.HUMIDITY);
@@ -323,10 +323,8 @@ namespace friction
 			if (m_DataHandler.GetCurTable() == "All")
 			{
 				string strSpring = m_DataHandler.GetCurSpring();
-				List<string> tableList = m_DataHandler.GetTableList();
-
-				if(tableList.Count > 0)
-					OnApplyData(this, strSpring, tableList[0]);
+				string strTable = m_DataHandler.GetPrevTable();
+				OnApplyData(this, strSpring, strTable);
 			}
 
 			OpenPanel(m_TrendGraphPanel);
@@ -352,6 +350,12 @@ namespace friction
 			{
 				if (m_TrendGraphPanel != null)
 					m_TrendGraphPanel.UpdateGraph();
+
+				if (m_RadarGraphPanel != null && m_RadarGraphPanel.Visible == true)
+				{
+					OnApplyData(this, strSpring, "All");
+					return;
+				}
 			}
 
 			if (sender != m_MaterialPanel)
@@ -550,11 +554,7 @@ namespace friction
 		public void OnTrendGraphActivated()
 		{
 			if (m_DataHandler.GetCurTable() == "All")
-			{
-				List<string> tableList = m_DataHandler.GetTableList();
-				if(tableList.Count > 0)
-					OnApplyData(this, m_DataHandler.GetCurSpring(), tableList[1]);
-			}
+				OnApplyData(this, m_DataHandler.GetCurSpring(), m_DataHandler.GetPrevTable());
 		}
 	}
 }