//+------------------------------------------------------------------+
//|                                                        MAExp.mq4 |
//|                                              Copyright 2014, AM2 |
//|                                      http://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2014, AM2"
#property link      "http://www.forexsystems.biz"
#property version   "1.00"
#property description "Moving Average sample expert advisor"

#define MAGICMA  20131111
//--- Inputs
input double Lots          =0.1;
input int    MovingPeriod  =12;
input int    MovingShift   =6;
input int    Delta         =6;
input int    Slip          =30;
input int    Count         =100;
//+------------------------------------------------------------------+
//| Calculate open positions                                         |
//+------------------------------------------------------------------+
int Orders(string symbol)
  {
   int buys=0,sells=0;
//---
   for(int i=0;i<OrdersTotal();i++)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;
      if(OrderSymbol()==Symbol() && OrderMagicNumber()==MAGICMA)
        {
         if(OrderType()==OP_BUY)  buys++;
         if(OrderType()==OP_SELL) sells++;
        }
     }
//--- return orders volume
   if(buys>0) return(buys);
   else       return(-sells);
  }
//+------------------------------------------------------------------+
//| Check for open order conditions                                  |
//+------------------------------------------------------------------+
void OpenPos()
  {
   double ma;
   int    res;
//--- get Moving Average 
   ma=iMA(NULL,0,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0);
//--- sell conditions
   if(Bid>ma && Bid-ma<Delta*Point)
     {
      res=OrderSend(Symbol(),OP_SELL,Lots,Bid,Slip,0,0,"",MAGICMA,0,Red);
      return;
     }
//--- buy conditions
   if(Ask<ma && ma-Ask<Delta*Point)
     {
      res=OrderSend(Symbol(),OP_BUY,Lots,Ask,Slip,0,0,"",MAGICMA,0,Blue);
      return;
     }
//---
  }
//+------------------------------------------------------------------+
//| Check for close order conditions                                 |
//+------------------------------------------------------------------+
void ClosePos()
  {
   double ma;
//--- get Moving Average 
   ma=iMA(NULL,0,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0);
//---
   for(int i=0;i<OrdersTotal();i++)
      //+------------------------------------------------------------------+
      //|                                                                  |
      //+------------------------------------------------------------------+
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;
      if(OrderMagicNumber()!=MAGICMA || OrderSymbol()!=Symbol()) continue;
      //--- check order type 
      if(OrderType()==OP_BUY)
        {
         if(Bid>ma)
           {
            CloseAll();
           }
         break;
        }
      if(OrderType()==OP_SELL)
        {
         if(Ask<ma)
           {
            CloseAll();
           }
         break;
        }
     }
//---
  }
//+------------------------------------------------------------------+  
void CloseAll()
  {
   bool cl,sel;
   for(int i=OrdersTotal()-1;i>=0;i--)
     {
      sel=OrderSelect(i,SELECT_BY_POS,MODE_TRADES);
      if(OrderSymbol()==Symbol())
        {
         if(OrderSymbol()==Symbol() && OrderMagicNumber()==MAGICMA)
           {
            if(OrderType()==OP_BUY) cl=OrderClose(OrderTicket(),OrderLots(),Bid,Slip,Blue);
            if(OrderType()==OP_SELL) cl=OrderClose(OrderTicket(),OrderLots(),Ask,Slip,Red);
           }
         Sleep(1000);
        }
     }
  }
//+------------------------------------------------------------------+
bool NewBar()
  {
   static datetime lastbar=0;
   datetime curbar=Time[0];
   if(lastbar!=curbar)
     {
      lastbar=curbar;
      return (true);
     }
   else
     {
      return(false);
     }
  }
//+------------------------------------------------------------------+
//| OnTick function                                                  |
//+------------------------------------------------------------------+
void OnTick()
  {
   if(NewBar())
     {
      if(Orders(Symbol())<=Count) OpenPos();
      ClosePos();
     }
//---
  }
//+------------------------------------------------------------------+