Finding Range over all bars in a chart for N periods...High to Lowest ???

[Digs]

int limit, records, N=2;
int counted_bars = IndicatorCounted();
limit = Bars - counted_bars;
if ( counted_bars < 0 ) return(0);
if ( counted_bars ==0 ) limit=Bars-1;
double EUR;

for(int i = 0; i < limit; i++)
{
EUR = (iHigh("EURUSD", 0, i) - Low[iLowest("EURUSD", 0, MODE_LOW, N, i )] );

}

I am trying to find the range from the current bar high to the lowest low over N periods, Including current bar,,,the above does seam to work ??

Any ideas...