//+------------------------------------------------------------------+
//|                                                     ichimoku.mq4 |
//|                Copyright © 2005, Nick Bilak, beluck[AT]gmail.com |
//|                                    http://www.profit-fx.com/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, Nick Bilak"
#property link      "http://www.profit-fx.com/"

#define MAGICNUM  112116

extern double StopLoss=30;
extern double TakeProfit=60;
extern int    slippage=0;  
extern int    shift=1;	

extern double Lots = 0.1;
extern double MaximumRisk = 10;
extern int mm = 0;

extern int       Tenkan = 9;
extern int       Kijun = 26;
extern int       Senkou = 52;
extern bool      InCloud=true;
extern int       OutBars = 2;

bool buysig,sellsig; int lastsig;
//+------------------------------------------------------------------+
//| Calculate open positions                                         |
//+------------------------------------------------------------------+
int CalculateCurrentOrders(string symbol)
  {
   int buys=0,sells=0;
//----
   int total=OrdersTotal();
   for(int i=0;i<total;i++)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false) break;
      if(OrderSymbol()==Symbol() && OrderMagicNumber()==MAGICNUM)
        {
         if(OrderType()==OP_BUY)  buys++;
         if(OrderType()==OP_SELL) sells++;
        }
     }
//---- return orders volume
   if(buys>0) return(buys);
   else       return(-sells);
  }

//+------------------------------------------------------------------+
//| Calculate optimal lot size                                       |
//+------------------------------------------------------------------+
double LotsOptimized()
  {
   double lot=Lots;
   int    orders=HistoryTotal();     // history orders total
   int    losses=0;                  // number of losses orders without a break
//---- select lot size
   if (mm != 0)
      lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk/100000.0,1);
   else
      lot=Lots;
//---- return lot size
   if(lot<0.1) lot=0.1;
   return(lot);
  }


//+------------------------------------------------------------------+
//| Check for open order conditions                                  |
//+------------------------------------------------------------------+
void CheckForSignals() {
      int i=1;
      while (i<=Bars-1) {
         double chinkou1=iIchimoku(NULL,0,Tenkan,Kijun,Senkou,MODE_CHINKOUSPAN,i);
         double chinkou2=iIchimoku(NULL,0,Tenkan,Kijun,Senkou,MODE_CHINKOUSPAN,i+1);
         if ((chinkou1>=Open[1] && chinkou2<=Open[1]) || (chinkou1<=Open[1] && chinkou2>=Open[1]))
            break;
         i++;
      }

      double senkouAi=iIchimoku(NULL,0,Tenkan,Kijun,Senkou,MODE_SENKOUSPANA,i);
      double senkouBi=iIchimoku(NULL,0,Tenkan,Kijun,Senkou,MODE_SENKOUSPANA,i);
      
      double senkouB[5];
      for (i=shift; i<=shift+OutBars; i++)
         senkouB[i]=iIchimoku(NULL,0,Tenkan,Kijun,Senkou,MODE_SENKOUSPANB,i);

      buysig=false;
      if (Open[shift+OutBars]<senkouB[shift+OutBars] && Close[shift+OutBars]<senkouB[shift+OutBars]) { //bar crossed senkouB
         buysig=true;
         if (InCloud && chinkou1<=senkouBi && chinkou1>=senkouAi && senkouAi<senkouBi)
            buysig=false;
         else 
            for (i=shift;i<shift+OutBars;i++)
               if (Open[i]>=Close[i] || Open[i]<senkouB[i])
                      buysig=false;
      }
      sellsig=false;
      if (Open[shift+OutBars]<senkouB[shift+OutBars] && Close[shift+OutBars]<senkouB[shift+OutBars]) { //bar crossed senkouB
         sellsig=true;
         for (i=shift;i<shift+OutBars;i++)
            if (Open[i]<=Close[i] || Open[i]>senkouB[i])
                   sellsig=false;
      }
}

void CheckForOpen() {
   int    res;
//---- sell conditions
   if(sellsig && lastsig!=-1)  {
      res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,slippage,Bid+StopLoss*Point,Bid-TakeProfit*Point,"ichim",MAGICNUM,0,Red);
      lastsig=-1;
      return;
   }
//---- buy conditions
   if(buysig && lastsig!=1)  {
      res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,slippage,Ask-StopLoss*Point,Ask+TakeProfit*Point,"ichim",MAGICNUM,0,Blue);
      lastsig = 1;
      return;
   }
}
  
  
//+------------------------------------------------------------------+
//| Check for close order conditions                                 |
//+------------------------------------------------------------------+
void CheckForClose()  {
   int total=OrdersTotal();
   for(int i=0;i<total;i++)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==false)  break;
      if(OrderMagicNumber()!=MAGICNUM || OrderSymbol()!=Symbol()) continue;
      //---- check order type 
      if(OrderType()==OP_BUY)
        {
         if (sellsig) OrderClose(OrderTicket(),OrderLots(),Bid,slippage,White);
         break;
        }
      if(OrderType()==OP_SELL)
        {
         if (buysig) OrderClose(OrderTicket(),OrderLots(),Ask,slippage,White);
         break;
        }
     }
}


//+------------------------------------------------------------------+
//| Start function                                                   |
//+------------------------------------------------------------------+
void start()  {

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

   //---- check for signals
   CheckForSignals();

   //---- calculate open orders by current symbol
   if (CalculateCurrentOrders(Symbol())==0) 
      CheckForOpen();
   else              
      CheckForClose();
}
//+------------------------------------------------------------------+