diff --git a/MainForm.Designer.cs b/MainForm.Designer.cs
index 7d4e050..6fa7493 100644
--- a/MainForm.Designer.cs
+++ b/MainForm.Designer.cs
@@ -127,7 +127,7 @@
 			this.tbSearchMax.Name = "tbSearchMax";
 			this.tbSearchMax.Size = new System.Drawing.Size(37, 21);
 			this.tbSearchMax.TabIndex = 6;
-			this.tbSearchMax.Text = "10.5";
+			this.tbSearchMax.Text = "10.5%";
 			this.tbSearchMax.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// tbBidMin
@@ -136,7 +136,7 @@
 			this.tbBidMin.Name = "tbBidMin";
 			this.tbBidMin.Size = new System.Drawing.Size(37, 21);
 			this.tbBidMin.TabIndex = 8;
-			this.tbBidMin.Text = "9.0";
+			this.tbBidMin.Text = "9.0%";
 			this.tbBidMin.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// tbBidAmount
@@ -199,7 +199,7 @@
 			this.tbTrailing.Name = "tbTrailing";
 			this.tbTrailing.Size = new System.Drawing.Size(100, 21);
 			this.tbTrailing.TabIndex = 10;
-			this.tbTrailing.Text = "1.0";
+			this.tbTrailing.Text = "1.0%";
 			this.tbTrailing.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// label5
@@ -217,7 +217,7 @@
 			this.tbLossCut.Name = "tbLossCut";
 			this.tbLossCut.Size = new System.Drawing.Size(100, 21);
 			this.tbLossCut.TabIndex = 10;
-			this.tbLossCut.Text = "2.0";
+			this.tbLossCut.Text = "2.0%";
 			this.tbLossCut.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// label6
@@ -244,7 +244,7 @@
 			this.tbSearchMin.Name = "tbSearchMin";
 			this.tbSearchMin.Size = new System.Drawing.Size(37, 21);
 			this.tbSearchMin.TabIndex = 14;
-			this.tbSearchMin.Text = "9.0";
+			this.tbSearchMin.Text = "9.0%";
 			this.tbSearchMin.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// btApply
@@ -273,7 +273,7 @@
 			this.tbBidMax.Name = "tbBidMax";
 			this.tbBidMax.Size = new System.Drawing.Size(37, 21);
 			this.tbBidMax.TabIndex = 8;
-			this.tbBidMax.Text = "10.0";
+			this.tbBidMax.Text = "10.0%";
 			this.tbBidMax.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
 			// 
 			// label8
diff --git a/MainForm.cs b/MainForm.cs
index 2f407a2..8f6f3c6 100644
--- a/MainForm.cs
+++ b/MainForm.cs
@@ -1,13 +1,5 @@
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
-using MySql.Data.MySqlClient;
 using System.Collections;
 using System.Reflection;
 
@@ -44,17 +36,11 @@ namespace upper_limit_crawler
 		{
 			InitializeComponent();
 
-            m_DataMgr.m_Setting.m_fSearchMin = float.Parse(tbSearchMin.Text);
-            m_DataMgr.m_Setting.m_fSearchMax = float.Parse(tbSearchMax.Text);
-            m_DataMgr.m_Setting.m_fBidMin = float.Parse(tbBidMin.Text);
-			m_DataMgr.m_Setting.m_fBidMax = float.Parse(tbBidMax.Text);
-			m_DataMgr.m_Setting.m_fBidAmount = float.Parse(tbBidAmount.Text);
-            m_DataMgr.m_Setting.m_fTimeout = float.Parse(tbTimeout.Text);
-            m_DataMgr.m_Setting.m_fTrailing = float.Parse(tbTrailing.Text);
-            m_DataMgr.m_Setting.m_fLossCut = float.Parse(tbLossCut.Text);
+			btApply_Click(null, null);
 
 
-            SetDoubleBuffered(lvWatch);
+
+			SetDoubleBuffered(lvWatch);
 
             m_Monitor.SetView(lvWatch);
 
@@ -123,15 +109,17 @@ namespace upper_limit_crawler
         {
             try
             {
-                m_DataMgr.m_Setting.m_fSearchMin = float.Parse(tbSearchMin.Text);
-                m_DataMgr.m_Setting.m_fSearchMax = float.Parse(tbSearchMax.Text);
-                m_DataMgr.m_Setting.m_fBidMin = float.Parse(tbBidMin.Text);
-				m_DataMgr.m_Setting.m_fBidMax = float.Parse(tbBidMax.Text);
+                m_DataMgr.m_Setting.m_fSearchMin = float.Parse(tbSearchMin.Text.Replace("%", ""));
+                m_DataMgr.m_Setting.m_fSearchMax = float.Parse(tbSearchMax.Text.Replace("%", ""));
+                m_DataMgr.m_Setting.m_fBidMin = float.Parse(tbBidMin.Text.Replace("%", ""));
+				m_DataMgr.m_Setting.m_fBidMax = float.Parse(tbBidMax.Text.Replace("%", ""));
 				m_DataMgr.m_Setting.m_fBidAmount = float.Parse(tbBidAmount.Text);
                 m_DataMgr.m_Setting.m_fTimeout = float.Parse(tbTimeout.Text);
-                m_DataMgr.m_Setting.m_fTrailing = float.Parse(tbTrailing.Text);
-                m_DataMgr.m_Setting.m_fLossCut = float.Parse(tbLossCut.Text);
-            }
+                m_DataMgr.m_Setting.m_fTrailing = float.Parse(tbTrailing.Text.Replace("%", ""))/100;
+				m_DataMgr.m_Setting.m_fLossCut = float.Parse(tbLossCut.Text.Replace("%", ""))/100;
+
+				btCancel_Click(null, null);
+			}
             catch(Exception ex)
             {
                 UlUtil.Trace(ex.ToString());
@@ -140,14 +128,14 @@ namespace upper_limit_crawler
 
         private void btCancel_Click(object sender, EventArgs e)
         {
-            tbSearchMin.Text = m_DataMgr.m_Setting.m_fSearchMin.ToString("0.0");
-            tbSearchMax.Text = m_DataMgr.m_Setting.m_fSearchMax.ToString("0.0");
-            tbBidMin.Text = m_DataMgr.m_Setting.m_fBidMin.ToString("0.0");
-			tbBidMax.Text = m_DataMgr.m_Setting.m_fBidMax.ToString("0.0");
+            tbSearchMin.Text = m_DataMgr.m_Setting.m_fSearchMin.ToString("0.0")+"%";
+            tbSearchMax.Text = m_DataMgr.m_Setting.m_fSearchMax.ToString("0.0") + "%";
+            tbBidMin.Text = m_DataMgr.m_Setting.m_fBidMin.ToString("0.0") + "%";
+			tbBidMax.Text = m_DataMgr.m_Setting.m_fBidMax.ToString("0.0") + "%";
 			tbBidAmount.Text = m_DataMgr.m_Setting.m_fBidAmount.ToString("###,###,###,###,###");
             tbTimeout.Text = m_DataMgr.m_Setting.m_fTimeout.ToString("0.###");
-            tbTrailing.Text = m_DataMgr.m_Setting.m_fTrailing.ToString("0.0");
-            tbLossCut.Text = m_DataMgr.m_Setting.m_fLossCut.ToString("0.0");
+            tbTrailing.Text = m_DataMgr.m_Setting.m_fTrailing.ToString("0.0%");
+            tbLossCut.Text = m_DataMgr.m_Setting.m_fLossCut.ToString("0.0%");
         }
 
 		private void btBalance_Click(object sender, EventArgs e)
diff --git a/ULBalanceDlg.cs b/ULBalanceDlg.cs
index f9b0e76..e25063c 100644
--- a/ULBalanceDlg.cs
+++ b/ULBalanceDlg.cs
@@ -30,6 +30,9 @@ namespace upper_limit_crawler
 			public long m_iUnitBEP;
 
 			public int m_iCurPrice;
+			public int m_iMaxPrice;
+
+			public bool m_bCheck;
 		};
 
 
@@ -68,7 +71,9 @@ namespace upper_limit_crawler
 			m_Td6033.BlockRequest2(1);
 
 			lvBalance.Items.Clear();
-			m_OwnList.Clear();
+			//m_OwnList.Clear();
+
+			m_OwnList.All(c => { c.m_bCheck = false; return true; });
 
 			int iCnt = m_Td6033.GetHeaderValue(7);
 			for(int i = 0; i<iCnt; i++)
@@ -87,7 +92,12 @@ namespace upper_limit_crawler
 
 				int iCurPrice = (int)(iEvaluationPrice/iConclusionBalanceCnt);
 
-				OWN_ITEM item = new OWN_ITEM();
+				OWN_ITEM item = m_OwnList.Find(itemFind => itemFind.m_strCode == strCode);
+				if (item == null)
+				{
+					item = new OWN_ITEM();
+					m_OwnList.Add(item);
+				}
 				item.m_strCodeName = strCodeName;
 				item.m_iPayBalance = iPayBalance;
 				item.m_iPayUnitPrice = iPayUnitPrice;
@@ -100,13 +110,20 @@ namespace upper_limit_crawler
 				item.m_dConclusionUnitPrice = dConclusionUnitPrice;
 				item.m_iUnitBEP = iUnitBEP;
 				item.m_iCurPrice = iCurPrice;
-				m_OwnList.Add(item);
+				item.m_iMaxPrice = iCurPrice;
+				item.m_bCheck = true;
+				
 
 				string[] row = { strCode, strCodeName, dConclusionUnitPrice.ToString("###,###,##0"),
 					iUnitBEP.ToString("###,###,##0"), iCurPrice.ToString("###,###,##0"),
 					iEvaluationProfit.ToString("###,###,##0"), iConclusionBalanceCnt.ToString("###,###,##0"), 
 					iEvaluationPrice.ToString("###,###,##0"), dReturn.ToString("#,##0.00")+"%" };
-				var listViewItem = new ListViewItem(row);
+				ListViewItem listViewItem = new ListViewItem(row);
+				listViewItem.UseItemStyleForSubItems = false;
+				if (dReturn > 0)
+					listViewItem.SubItems[chProfitRate.Index].ForeColor = Color.Red;
+				else if (dReturn < 0)
+					listViewItem.SubItems[chProfitRate.Index].ForeColor = Color.Blue;
 				lvBalance.Items.Add(listViewItem);
 
 				UlUtil.Trace(string.Format("{0} {1} {2} {3} {4} {5} {6} {7} {8} {9} {10}",
@@ -115,7 +132,9 @@ namespace upper_limit_crawler
 					dReturn, strCode, iAskableCnt, dConclusionUnitPrice, iUnitBEP));
 			}
 
-			foreach(ColumnHeader col in lvBalance.Columns)
+			m_OwnList.RemoveAll(c => c.m_bCheck = false);
+
+			foreach (ColumnHeader col in lvBalance.Columns)
 				col.Width=-2;
 		}
 
@@ -132,6 +151,7 @@ namespace upper_limit_crawler
 				strPriceList += item.m_strCode;
 			}
 
+
 			m_StockMst2.SetInputValue(0, strPriceList);
 			m_StockMst2.BlockRequest2(1);
 
@@ -141,9 +161,13 @@ namespace upper_limit_crawler
 				string strCode = m_StockMst2.GetDataValue(0, i);
 				int iCurPrice = m_StockMst2.GetDataValue(3, i);
 
+				// data update
 				OWN_ITEM listItem = m_OwnList.First(item => item.m_strCode == strCode);
-				if (listItem != null)
-					listItem.m_iCurPrice = iCurPrice;
+				if (listItem == null)
+					continue;
+
+				listItem.m_iCurPrice = iCurPrice;
+				listItem.m_iMaxPrice = Math.Max(iCurPrice, listItem.m_iMaxPrice);
 
 				ListViewItem lvItem = lvBalance.FindItemWithText(strCode);
 				if (lvItem != null)
@@ -153,11 +177,22 @@ namespace upper_limit_crawler
 					lvItem.SubItems[chEvaluationPrice.Index].Text = (iCurPrice*listItem.m_iConclusionBalanceCnt).ToString("###,###,##0");
 					lvItem.SubItems[chProfitRate.Index].Text = (iCurPrice / (float)listItem.m_iUnitBEP - 1.0f).ToString("#,##0.00%");
 				}
+
+				// cut loss and trailing
+				if (iCurPrice <= listItem.m_iUnitBEP * (1.0f - m_DataMgr.m_Setting.m_fLossCut) ||
+					iCurPrice <= listItem.m_iMaxPrice * (1.0f - m_DataMgr.m_Setting.m_fTrailing))
+				{
+					m_DataMgr.GetTrader().SellCurPrice(listItem.m_strCode, listItem.m_iPayBalance);
+					
+					// 미체결 잔량 취소
+				}
 			}
 		}
 
 		private void RefreshData(object sender, EventArgs e)
 		{
+			m_MainTimer.Enabled = false;
+
 			int iCurTime = Environment.TickCount;
 			if(m_iLastTime==0)
 			{
@@ -182,6 +217,8 @@ namespace upper_limit_crawler
 			
 
 			m_iLastTime=iCurTime;
+
+			m_MainTimer.Enabled = true;
 		}
 
 		private void btRefresh_Click(object sender, EventArgs e)
diff --git a/ULMonitor.cs b/ULMonitor.cs
index e6e9a9e..cbe3969 100644
--- a/ULMonitor.cs
+++ b/ULMonitor.cs
@@ -14,6 +14,7 @@ namespace upper_limit_crawler
 		CPSYSDIBLib.CpSvrNew7043 m_7043 = new CPSYSDIBLib.CpSvrNew7043();
 		int m_iMonitorDelay = 0;
         ListView lvWatch;
+
 		bool m_bRequesting = false;
 
         public ULMonitor(ULDataMgr DataMgr) : base(DataMgr)
@@ -34,10 +35,10 @@ namespace upper_limit_crawler
             lvWatch = view;
         }
 
-        void Check()
+        bool Check()
 		{
 			if (m_bRequesting == true || UlUtil.GetLimitRemainCountRQ() < 30)
-				return;
+				return false;
 
 			m_bRequesting = true;
             m_7043.SetInputValue(7, (short)m_DataMgr.m_Setting.m_fSearchMin);
@@ -135,6 +136,7 @@ namespace upper_limit_crawler
 			}
 
 			m_bRequesting = false;
+			return true;
 		}
 
 		public override void Refresh(int iCurTime)
@@ -149,8 +151,8 @@ namespace upper_limit_crawler
 			m_iMonitorDelay -= iDeltaT;
 			if(m_iMonitorDelay <= 0)
 			{
-				Check();
-				m_iMonitorDelay = MONITOR_DELAY;
+				bool bRequest = Check();
+				m_iMonitorDelay = (bRequest == true) ? MONITOR_DELAY : 1000;
 			}
 
 			base.Refresh(iCurTime);
diff --git a/ULTrader.cs b/ULTrader.cs
index 8d5841e..392cc03 100644
--- a/ULTrader.cs
+++ b/ULTrader.cs
@@ -15,6 +15,9 @@ namespace upper_limit_crawler
 
 		string[] m_astrAccounts = null;
 
+		object lockBuy = new object();
+		object lockSell = new object();
+
 		public ULTrader()
 		{
 			m_Util.TradeInit();
@@ -111,50 +114,59 @@ namespace upper_limit_crawler
 
 		public void Buy(string strCode, int iUnitPrice, int iBidAmount)
 		{
-			int iCnt = iBidAmount/ iUnitPrice;
-			iCnt = 1;
+			lock(lockBuy)
+			{
+				int iCnt = iBidAmount / iUnitPrice;
+				iCnt = 1;
 
-			m_Td0311Bid.SetInputValue(0, "2");
-			m_Td0311Bid.SetInputValue(1, m_astrAccounts[0]);
-			m_Td0311Bid.SetInputValue(3, strCode);
-			m_Td0311Bid.SetInputValue(4, iCnt);  // 수량
-			m_Td0311Bid.SetInputValue(5, iUnitPrice); // 단가
-			m_Td0311Bid.SetInputValue(7, "0");
-			m_Td0311Bid.SetInputValue(8, "03");
+				m_Td0311Bid.SetInputValue(0, "2");
+				m_Td0311Bid.SetInputValue(1, m_astrAccounts[0]);
+				m_Td0311Bid.SetInputValue(3, strCode);
+				m_Td0311Bid.SetInputValue(4, iCnt);  // 수량
+				m_Td0311Bid.SetInputValue(5, iUnitPrice); // 단가
+				m_Td0311Bid.SetInputValue(7, "0");
+				m_Td0311Bid.SetInputValue(8, "03");
 
-			m_Td0311Bid.BlockRequest();
+				m_Td0311Bid.BlockRequest();
+			}
 		}
 
 		public void Sell(string strCode, int iUnitPrice, int iCnt)
 		{
-			//long iCnt = (long)Math.Floor(fAskAmount/fCurPrice);
-			//iCnt=1;
+			lock (lockSell)
+			{
+				//long iCnt = (long)Math.Floor(fAskAmount/fCurPrice);
+				//iCnt=1;
 
-			m_Td0311Ask.SetInputValue(0, "1");
-			m_Td0311Ask.SetInputValue(1, m_astrAccounts[0]);
-			m_Td0311Ask.SetInputValue(3, strCode);
-			m_Td0311Ask.SetInputValue(4, iCnt);  // 수량
-			m_Td0311Ask.SetInputValue(5, iUnitPrice); // 단가
-			m_Td0311Ask.SetInputValue(7, "0");
-			m_Td0311Ask.SetInputValue(8, "03");
+				m_Td0311Ask.SetInputValue(0, "1");
+				m_Td0311Ask.SetInputValue(1, m_astrAccounts[0]);
+				m_Td0311Ask.SetInputValue(3, strCode);
+				m_Td0311Ask.SetInputValue(4, iCnt);  // 수량
+				m_Td0311Ask.SetInputValue(5, iUnitPrice); // 단가
+				m_Td0311Ask.SetInputValue(7, "0");
+				m_Td0311Ask.SetInputValue(8, "03");
 
-			m_Td0311Ask.BlockRequest();
+				m_Td0311Ask.BlockRequest();
+			}
 		}
 
 		public void SellCurPrice(string strCode, int iCnt)
 		{
-			//long iCnt = (long)Math.Floor(fAskAmount/fCurPrice);
-			//iCnt=1;
+			lock (lockSell)
+			{
+				//long iCnt = (long)Math.Floor(fAskAmount/fCurPrice);
+				//iCnt=1;
 
-			m_Td0311Ask.SetInputValue(0, "1");
-			m_Td0311Ask.SetInputValue(1, m_astrAccounts[0]);
-			m_Td0311Ask.SetInputValue(3, strCode);
-			m_Td0311Ask.SetInputValue(4, iCnt);  // 수량
-			m_Td0311Ask.SetInputValue(5, 0); // 단가
-			m_Td0311Ask.SetInputValue(7, "0");
-			m_Td0311Ask.SetInputValue(8, "03");
+				m_Td0311Ask.SetInputValue(0, "1");
+				m_Td0311Ask.SetInputValue(1, m_astrAccounts[0]);
+				m_Td0311Ask.SetInputValue(3, strCode);
+				m_Td0311Ask.SetInputValue(4, iCnt);  // 수량
+				m_Td0311Ask.SetInputValue(5, 0); // 단가
+				m_Td0311Ask.SetInputValue(7, "0");
+				m_Td0311Ask.SetInputValue(8, "03");
 
-			m_Td0311Ask.BlockRequest();
+				m_Td0311Ask.BlockRequest();
+			}	
 		}
 	}
 }