//+------------------------------------------------------------------+
//|                                   Correlation USDCHF/EURUSD .mq4 |
//|                                  Copyright © 2005, Yuri Makarov. |
//|                                       http://mak.tradersmind.com |
//+------------------------------------------------------------------+
// Correlates  chf prive ON eur 1 min chart
// if chf bar (1 min) is greater than 3 pips it recommends sell/buy eur

#property copyright "Copyright © 2005, Perky_z."
#property link      "Perky_z@yahoo.com"
#include <stdlib.mqh>

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 OrangeRed
//----
extern string Curency = "CHF";
//----
double UsdChf[],UsdChfO[];
double Idx[];
double diff,diff1;
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int init()
  {
   IndicatorShortName(Curency);
   SetIndexStyle(0, DRAW_LINE);
   SetIndexBuffer(0, Idx);
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void start()
  {
   double dLastBarCLOSE, dLastBarOPEN;
   //I've put the period statement in - this means that
   // you can get close for other periods onto the current chart
   int nBars = ArrayCopySeries(UsdChf, MODE_CLOSE, "USDCHF", PERIOD_M1);
   int LastError = GetLastError(); 
   if(LastError != 4066)
     {
       int lastBars = nBars;
       for( int k = 0; k <10; k++) 
         {
           dLastBarCLOSE = UsdChf[0];
           nBars = ArrayCopySeries(UsdChf, MODE_CLOSE, "USDCHF", PERIOD_M1);
           LastError = GetLastError();
           if(dLastBarCLOSE == UsdChf[0] && lastBars==nBars && LastError == 0) 
               break;
           lastBars = nBars;
         }
     }
   if(LastError != 0)
      {
        Print("Error 001: ArrayCopySeries(): Error == ", ErrorDescription(LastError), "(",
              LastError, "), k == ",k, ", PERIOD_M1, nBars == ", nBars);
        return(0);
      }
//----
   nBars = ArrayCopySeries(UsdChfO, MODE_OPEN, "USDCHF", PERIOD_M1);
   LastError = GetLastError(); 
   if(LastError == 4066)
     {
       lastBars = nBars;
       for(k = 0; k <10; k++) 
         {
           dLastBarOPEN = UsdChf[0];
           nBars = ArrayCopySeries(UsdChfO, MODE_OPEN, "USDCHF", PERIOD_M1);
           LastError = GetLastError();
           if(dLastBarCLOSE == UsdChf[0] && lastBars==nBars && LastError == 0) 
               break;
           lastBars = nBars;
         }
     }
   if(LastError != 0)
      {
        Print("Error 002: ArrayCopySeries(): Error == ", ErrorDescription(LastError), "(",
              LastError, "), k == ",k, ", PERIOD_M1, nBars == ", nBars);
        return(0);
      }
//----
   int copylimit=MathMin(ArraySize(UsdChf),ArraySize(UsdChfO))-1;
   int counted_bars = IndicatorCounted();
   double USD;
//----
   if(counted_bars < 0) 
       return(-1);
   int limit = Bars - counted_bars;
   if(counted_bars==0) limit--;
   limit=MathMin(limit,copylimit);
   PrintFormat("ArraySize(UsdChf)=%d ArraySize(UsdChfO)=%d  limit=%d",ArraySize(UsdChf),ArraySize(UsdChfO),limit);
   for(int i = 0; i < limit; i++)
     {
       diff = (UsdChf[i] - UsdChfO[i]);
       diff1 = (UsdChf[i+1] - UsdChfO[i+1]);
       Comment("Before", diff1, "\nnow    ", diff);
       if(Curency == "CHF") 
           Idx[i] = UsdChf[i]; 
       if(diff <= -0.0006 && diff < 0)
         {
           Comment("diff ",diff," Buy eur");
           Alert ("USDCHF ", diff, " Difference BUY EURUSD");
         }
       if(diff >= 0.0006 && diff > 0)  
         {
           Comment("diff ", diff, " Sell eur");
           Alert ("USDCHF ", diff, " Difference SELL EURUSD");
         }
       if(Curency == "CHF") 
           Idx[i] = UsdChf[i]; 
      
     }
  }
//+------------------------------------------------------------------+