Daily Average movement over a certain period of All Currency Pairs

Hello,

I'm having some difficulty writing a script that will calculate the average pip movement over a period of 20 days for every currency pair, and then exporting those values to a .csv file.

Here is the code:

int R20=0;
   int i=0;
   int n = 0;
   int handle;
   string currencies[100];
   string curavg[100];
   
   
   //Define currencies in array
   
   currencies[0] = "EURUSD";
   currencies[1] = "USDJPY";
   currencies[2] = "GBPUSD";
   currencies[3] = "USDCHF";
   currencies[4] = "USDCAD";
   currencies[5] = "AUDUSD";
   currencies[6] = "NZDUSD";
   currencies[7] = "EURGBP";
   currencies[8] = "EURJPY";
   currencies[9] = "EURCHF";  
   currencies[10] = "GBPCHF";
   currencies[11] = "GBPJPY";
   currencies[12] = "AUDJPY";
   currencies[13] = "CHFJPY";
   currencies[14] = "EURCAD";
   currencies[15] = "EURAUD";
   currencies[16] = "AUDCAD";
   currencies[17] = "AUDNZD";
   currencies[18] = "NZDJPY";
   currencies[19] = "AUDCHF"; 
   currencies[20] = "EURDKK";
   currencies[21] = "EURNZD";
   currencies[22] = "GBPNZD";
   currencies[23] = "NZDCHF";
   currencies[24] = "USDCZK";
   currencies[25] = "USDDKK";
   currencies[26] = "USDMXN";
   currencies[27] = "USDPLN";
   currencies[28] = "USDSGD";
   currencies[29] = "USDZAR";
   currencies[30] = "GBPCAD";
   currencies[31] = "CADJPY";
   
    

 //calculate average over period of 20, and put values into array  
while (n <= 31)

{
   for(i=1;i<=20;i++)
   R20   =    R20 +  (iHigh(currencies[n],PERIOD_D1,i)-iLow(currencies[n],PERIOD_D1,i))/Point;

   R20 = R20/20;
    
   curavg[n] = R20;
 
n = n + 1;

}

i = 0;

  
 //Write Data To .csv File 
  
   handle=FileOpen("D1Avg.csv", FILE_CSV|FILE_WRITE, ',');

   while (i <= 31)
   
   {
   
   
     if(handle>0)
    {
     FileWrite(handle,currencies[i],curavg[i]  );
    
     
    }
        i = i + 1;
        
        }
        
        
   FileClose(handle);   

Now, my problem is the following:

The code seems to work fine, but if I run the script, all values except the timeframe that I am on is rubbish. If I go the another currency window, then that currency value is correct except all of the other currency pairs.

What can be the problem? Is there some way to load the data from all the currency pairs before doing the calculations? I think the correct values are not load correctly before the calculations are done.

Thanks!