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I want to create a moving sum of the sign of the bars: an up bar is +1, a down bar is -1, on a window of adjustable size: how do I work with a window? should be extern int window=10; and then??

   for(int i=0; i<limit; i++)
   {  
   if (iClose(0,0,i)>iClose(0,0,i+1)) sign[i]=1;
   else sign[i]=-1;
   sum[i]+=sum[i];
   }

int extern int Window.Length = 10;
:
SetIndexDrawBegin(0, Window.Length+1);
:
int counted = IndicatorCounted();
if (counted <= Window.Length) counted = Window.Length+1;  // Look back
for(int iBar = Bars - 1 - counted; iBar >= 0; iBar--){
   sum[iBar]=0;
   for (int iWin = iBar + Window.Length - 1; iWin >= iBar; iWin--)
      if (Close[iWin] > Close[iWin+1]) sum[iBar] += 1;
      else                             sum[iBar] -= 1;
}