//+------------------------------------------------------------------+
//|                                   SQ_IndicatorValuesExportEA.mq4 |
//|                                                                  |
//|                    EA to export indicator values from MetaTrader |
//|                Output to: /{Data folder}/tester/files/******.csv |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2018 StrategyQuant"
#property link      "http://www.StrategyQuant.com"

string currentTime = "";
string lastTime = "";

//+------------------------------------------------------------------+

int start() {
   currentTime = TimeToStr(Time[1], TIME_DATE|TIME_MINUTES|TIME_SECONDS);
   if(currentTime == lastTime) {
      return(0);
   }
   
   double value;

	// change the file name below
	string fileName = "Envelopes_14_0_0_0_0.1_upper.csv";

   int handle = FileOpen(fileName, FILE_READ | FILE_WRITE, ";");
   if(handle>0) {
      FileSeek(handle,0,SEEK_END);

      // here is the indicator value 
      value = iEnvelopes("NULL", 0 , 14 , 0 , 0 , 0 , 0.1 , 1 , 1); // upper value
      //value = iEnvelopes(NULL, 0 , 14 , 0 , 0 , 0 , 0.1 , 2 , 1); // lower value
      
	   FileWrite(handle, TimeToStr(Time[1], TIME_DATE|TIME_MINUTES|TIME_SECONDS), Open[1], High[1], Low[1], Close[1], Volume[1], value);

	   FileClose(handle);
   }

   lastTime = currentTime;
   
   return(0);
}

//+------------------------------------------------------------------+