//+------------------------------------------------------------------+
//|                                                       Martin.mq4 |
//|                                              Copyright 2015, AM2 |
//|                                      http://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2015, AM2"
#property link      "http://www.forexsystems.biz"
#property description "Martin expert advisor"

extern int Magic      = 20150916; //магик
extern int StopLoss   = 1200;     //лось
extern int TakeProfit = 1400;     //язь
extern int Slip       = 30;       //реквот
extern int BuySell    = 0;        //0-бай. 1-селл
extern int StopTake   = 0;        //0-мартин после стопа. 1-мартин после тейка
extern double Lots    = 0.1;      //лот
extern double MaxLot  = 5;        //макс. лот
extern double KLot    = 2;        //умножение лота
//+------------------------------------------------------------------+
int CountTrades()
  {
   int count=0;
   for(int i=OrdersTotal()-1;i>=0;i--)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES))
        {
         if(OrderSymbol()==Symbol() && OrderMagicNumber()==Magic)
           {
            if(OrderType()==OP_BUY || OrderType()==OP_SELL)
               count++;
           }
        }
     }
   return(count);
  }
//+------------------------------------------------------------------+
//| Check for open order conditions                                  |
//+------------------------------------------------------------------+
void OpenPos()
  {
   int    res;
   double pr=0,sl=0,tp=0;

//---- buy 
   if(BuySell==0)
     {
      pr=NormalizeDouble(Ask,Digits);
      if(StopLoss>0) sl=NormalizeDouble(Ask-StopLoss*Point,Digits); else sl=0;
      if(TakeProfit>0) tp=NormalizeDouble(Ask+TakeProfit*Point,Digits);
      res=OrderSend(Symbol(),OP_BUY,Lot(),pr,Slip,sl,tp,"",Magic,0,Blue);
      return;
     }
//---- sell   
   if(BuySell==1)
     {
      pr=NormalizeDouble(Bid,Digits);
      if(StopLoss>0) sl=NormalizeDouble(Bid+StopLoss*Point,Digits); else sl=0;
      if(TakeProfit>0) tp=NormalizeDouble(Bid-TakeProfit*Point,Digits);  else tp=0;
      res=OrderSend(Symbol(),OP_SELL,Lot(),pr,Slip,sl,tp,"",Magic,0,Red);
      return;
     }
  }
//+------------------------------------------------------------------+
//| Calculate optimal lot size                                       |
//+------------------------------------------------------------------+
double Lot()
  {
   double lot=0;
   if(OrdersHistoryTotal()==0)
     {
      lot=Lots;
     }
   if(OrderSelect(OrdersHistoryTotal()-1,SELECT_BY_POS,MODE_HISTORY))
     {
      if(OrderSymbol()==Symbol() && OrderMagicNumber()==Magic)
        {
         if(StopTake==0)
           {
            if(OrderProfit()>0)
              {
               lot=Lots;
              }
            if(OrderProfit()<=0)
              {
               lot=OrderLots()*KLot;
              }
           }
         if(StopTake==1)
           {
            if(OrderProfit()>0)
              {
               lot=OrderLots()*KLot;
              }
            if(OrderProfit()<=0)
              {
               lot=Lots;
              }
           }
        }
     }
   if(lot>MaxLot || lot==0)lot=Lots;
   return(lot);
  }
//+------------------------------------------------------------------+
//| Start function                                                   |
//+------------------------------------------------------------------+
void OnTick()
  {
   if(CountTrades()<1) OpenPos();
  }
//+------------------------------------------------------------------+