//+------------------------------------------------------------------+
//|                                                    mrmon-exp.mq4 |
//|                                  Nick Bilak, beluck[AT]gmail.com |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Nick Bilak"
#property link      "http://www.mql4.info/"
#include <stdlib.mqh>

extern int expertId = 1;

extern int TakeProfit = 17;
extern int StopLoss = 60;  
extern int TrailingStop = 10;  

extern double Lots = 0.1;      //fixed lot size
extern double MinLot = 0.1;    //minimum lot size
extern double MaximumRisk = 5; //% risk. lot size will be calculated so that stoploss was equal to risk% of balance
extern bool   FixedLot = true; //trigger to use MM

extern int TimeStart=0700;
extern int TimeStop=2400;

extern int EmaPeriod=10;
extern int SmaPeriod=40;

extern int    slippage=2;   	//slippage for market order processing
extern int    shift=1;			//shift to current bar, 

extern int    OrderTriesNumber=2; //to repeate sending orders when got some error

extern string    EAName="mrmon"; 

bool buysig,sellsig,closebuy,closesell; int lastsig,tries,x,y,co,lastdir=999,lastc;
double xp,xpc;


void start()  {

   //if (TimeCurrent()>1168560000) { Alert("1040-exp version expired"); return; }

   //---- check for history and trading
   if(Bars<100 || IsTradeAllowed()==false) return;

   CheckForSignals();
   
   CheckForOpen();
   
   TrailStop();
        
}


double LotsRisk(int StopLoss)  { 
   //MM lot size calculation
   double lot=Lots;
//---- select lot size
   if (!FixedLot)
      lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk*0.001/StopLoss,1);
   else
      lot=Lots;
//---- return lot size
   if(lot<MinLot) lot=MinLot;
   return(lot);
}

//+------------------------------------------------------------------+
//| Calculate open positions                                         |
//+------------------------------------------------------------------+
int CalculateCurrentOrders(string symbol)
  {
   int ord;
//----
   for(int i=0;i<OrdersTotal();i++)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;
      if(OrderSymbol()==symbol && OrderMagicNumber()==expertId) ord++;
     }
//---- return orders volume
   return(ord);
}

//+------------------------------------------------------------------+
//| Check for open order conditions                                  |
//+------------------------------------------------------------------+
void CheckForSignals() {
      

      //indicators variables
      double ema1 = iCustom(NULL,0,"humaverages",EmaPeriod,0,MODE_EMA,0,shift);
      //double ema2 = iCustom(NULL,0,"humaverages",EmaPeriod,0,MODE_EMA,0,shift+1);
      double sma1 = iCustom(NULL,0,"humaverages",SmaPeriod,0,MODE_SMA,0,shift);
      //double sma2 = iCustom(NULL,0,"humaverages",SmaPeriod,0,MODE_SMA,0,shift+1);

      buysig=false;
      sellsig=false;
      closebuy=false;
      closesell=false;
      
      
	   if (ema1>sma1) {
	      if (lastdir==999) { lastdir=1; return; }
         closesell=true;
         buysig=true;
	   }
	   if (ema1<sma1) {
	      if (lastdir==999) { lastdir=-1; return; }
         closebuy=true;
         sellsig=true;
	   }

}

void CheckForOpen() {
   int    res,tr;
   int ct=Hour()*100+Minute();
   if ( !(ct>=TimeStart && ct<TimeStop) ) return; //time restrictions for entry

//---- sell conditions
   co=CalculateCurrentOrders(Symbol());
   if (co>0) CheckForClose();
   co=CalculateCurrentOrders(Symbol());
   if(sellsig && lastdir>0)  {
	   if (co==0) {
	        res = OpenAtMarket(OP_SELL,LotsRisk(StopLoss));
	   }
	   if (res>0) { lastdir=-1; lastsig=Time[0]; }
      return;
   }
//---- buy conditions
   if(buysig && lastdir<0)  {
	   if (co==0) {
	        res = OpenAtMarket(OP_BUY,LotsRisk(StopLoss));
	   }
	   if (res>0) { lastdir=1; lastsig=Time[0]; }
      return;
   }
}
  
  
//+------------------------------------------------------------------+
//| Check for close order conditions                                 |
//+------------------------------------------------------------------+
void CheckForClose()  {
   bool bres; int tr;
   for(int i=0;i<OrdersTotal();i++)  {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false)  break;
      if(OrderMagicNumber()!=expertId || OrderSymbol()!=Symbol()) continue;
      //---- check order type 
      if(OrderType()==OP_BUY)
         if (closebuy) {
            bres=CloseAtMarket(OrderTicket(),OrderLots());
            break;
         }
      if(OrderType()==OP_SELL) 
         if (closesell) {
            bres=CloseAtMarket(OrderTicket(),OrderLots());
            break;
         }
   }
}



int OpenAtMarket(int mode,double lot) {
   int    res,tr,col;
   double openprice,sl,tp;
   tries=0;
   while (res<=0 && tries<OrderTriesNumber) {
      tr=0; while (tr<5 && !IsTradeAllowed()) { tr++; Sleep(2000); }
      RefreshRates();
      if (mode==OP_SELL) {
         openprice=Bid; 
         sl=openprice+StopLoss*Point;
         tp=openprice-TakeProfit*Point;
         col=Red;
      } else {
         //openprice=nd(Ask);
         openprice=Ask;
         sl=openprice-StopLoss*Point;
         tp=openprice+TakeProfit*Point;
         col=Blue;
      }
      res=OrderSend(Symbol(),mode,lot,openprice,slippage,sl,tp,EAName+expertId,expertId,0,col);
      tries++;
   }
   return(res);
}


bool CloseAtMarket(int ticket,double lot) {
   bool bres=false; int tr;
   tries=0;
   while (!bres && tries<OrderTriesNumber) {
      tr=0; while (tr<5 && !IsTradeAllowed()) { tr++; Sleep(2000); }
      RefreshRates();
      bres=OrderClose(ticket,lot,OrderClosePrice(),slippage,White);
      if (!bres) Print("Error closing order : ",ErrorDescription(GetLastError()));
      tries++;
   }
}


void TrailStop() {
   bool bres;
   double StopLoss;
   if ( TrailingStop > 2 ) {
      for (int i = 0; i < OrdersTotal(); i++) {
         if ( OrderSelect (i, SELECT_BY_POS) == false )  continue;
         if ( OrderSymbol() != Symbol() || OrderMagicNumber() != expertId )  continue;
         if ( OrderType() == OP_BUY ) {
            if ( Bid < OrderOpenPrice()+TrailingStop*Point )  return;
            StopLoss = Bid-TrailingStop*Point;
            if ( StopLoss > OrderStopLoss() ) {
                  bres=OrderModify (OrderTicket(), OrderOpenPrice(), StopLoss, OrderTakeProfit(), 0, White);
					   if (!bres) Print("Error Modifying BUY order : ",ErrorDescription(GetLastError()));
            }
         }
   
         if ( OrderType() == OP_SELL ) {
            if ( Ask > OrderOpenPrice()-TrailingStop*Point )  return;
            StopLoss = Ask+TrailingStop*Point;
            if ( StopLoss < OrderStopLoss() ) {
                  bres=OrderModify (OrderTicket(), OrderOpenPrice(), StopLoss, OrderTakeProfit(), 0, Gold);
					   if (!bres) Print("Error Modifying SELL order : ",ErrorDescription(GetLastError()));
            }
         }
      }
   }
   return;
}