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Drawing the Calculated Equation on EURUSD Chart

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Hello,

I have been trying to integrate my calculation on eurusd chart. However, I could not find where I am mistaken. Would you help me out with my codes at below ? Or what do you suggest to have result as a line on EURUSD chart ? 

 

Thanks. 

 

// The code is being used for educational purpose only.
//--------------------------------------------------------------------
#property indicator_chart_window    // Indicator is drawn in the main window
#property indicator_buffers 1       // Number of buffers
#property indicator_color1 Blue     // Color of the 1st line

 
  double Buf_0   [];             // Declaring arrays (for indicator buffer)
  double XAGUSD  [];             // symbol on mt4 of broker as an array
  double USDTRY  [];             // symbol on mt4 of broker as an array
  double EURTRY  [];             // symbol on mt4 of broker as an array
  double USDJPY  [];             // symbol on mt4 of broker as an array
  double USDCHF  [];             // symbol on mt4 of broker as an array
  double USDCAD  [];             // symbol on mt4 of broker as an array
  double GBPUSD  [];             // symbol on mt4 of broker as an array
  double USDINDEX[];             // symbol on mt4 of broker as an array
  double XAUUSD  [];             // symbol on mt4 of broker as an array
  double SP500   [];             // symbol on mt4 of broker as an array
  double DOW     [];             // symbol on mt4 of broker as an array
  double DAX     [];             // symbol on mt4 of broker as an array    
  double FTSE    [];             // symbol on mt4 of broker as an array
  double USOIL   [];             // symbol on mt4 of broker as an array
  
//--------------------------------------------------------------------
int init()                          // Special function init()
  {
   SetIndexBuffer(0,Buf_0);         // Assigning an array to a buffer
   SetIndexStyle (0,DRAW_LINE,STYLE_SOLID,2);// Line style
   return;                          // Exit the special funct. init()
  }
//--------------------------------------------------------------------
int start()                         // Special function start()
  {
   int i,                           // Bar index
       Counted_bars;                // Number of counted bars
//--------------------------------------------------------------------
   Counted_bars=IndicatorCounted(); // Number of counted bars
   i=Bars-Counted_bars-1;           // Index of the first uncounted
   while(i>=0)                      // Loop for uncounted bars
     {
        XAGUSD[i]       = 1.6382+0.000245*MarketInfo("XAGUSD",MODE_ASK);  //ask price at i. bar
        USDTRY[i]       = 0.25893*MarketInfo("USDTRY",MODE_ASK);          //ask price at i. bar
        EURTRY[i]       = 0.22969*MarketInfo("EURTRY",MODE_ASK);          //ask price at i. bar
        USDJPY[i]       = 0.000678*MarketInfo("USDJPY",MODE_ASK);         //ask price at i. bar 
        USDCHF[i]       = 0.02318*MarketInfo("USDCHF",MODE_ASK);          //ask price at i. bar
        USDCAD[i]       = 0.07650*MarketInfo("USDCAD",MODE_ASK);          //ask price at i. bar    
        GBPUSD[i]       = 0.08350*MarketInfo("GBPUSD",MODE_ASK);          //ask price at i. bar  
        USDINDEX[i]     = 0.007118*MarketInfo("#DXU5",MODE_ASK);          //ask price at i. bar   
        XAUUSD[i]       = 0.050014*MarketInfo("XAUUSD",MODE_ASK);         //ask price at i. bar
        SP500[i]        = 0.000019*MarketInfo("#ESU5",MODE_ASK);          //ask price at i. bar
        DOW[i]          = 0.000002*MarketInfo("#YMU5",MODE_ASK);          //ask price at i. bar
        DAX[i]          = 0.000001*MarketInfo("#FDXU5",MODE_ASK);         //ask price at i. bar 
        FTSE[i]         = 0.000001*MarketInfo("#FFIU5",MODE_ASK);         //ask price at i. bar 
        USOIL[i]        = 0.000031*MarketInfo("#CLV5",MODE_ASK);          //ask price at i. bar
        Buf_0[i]        =     XAGUSD[i]-USDTRY[i]+EURTRY[i]+USDJPY[i]
                             +USDCHF[i]+USDCAD[i]-GBPUSD[i]-USDINDEX[i]
                             -XAUUSD[i]+SP500[i]-DOW[i]-DAX[i]
                             +FTSE[i]-USOIL[i];             // Value of 0 buffer on i bar

      i--;                          // Calculating index of the next bar
     }
//--------------------------------------------------------------------
   return;                          // Exit the special funct. start()
  }
//--------------------------------------------------------------------

You don't size any of your Symbol arrays.

Why do you need arrays anyway? You are retrieving the current ask on every calculation, not a price relevant to bar[i]

GumRai:

You don't size any of your Symbol arrays.

Why do you need arrays anyway? You are retrieving the current ask on every calculation, not a price relevant to bar[i]

    I did not use arrays first and I did not get any changes on the chart and I also thought that array could keep the records of results of my calculations and then I could draw the result on the line. 

    I do not mind to get the line on the chart. I only need to have it somehow if you could understand my target on the codes.  

    I am learning and trying these on samples as ;

   http://www.forexmt4.com/_MT4_Tutorials/lesson11.pdf

   https://book.mql4.com/samples/icustom 

   http://stackoverflow.com/questions/26362199/mql4-coding-empty-buffer-in-line 

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