Are you comparing your results to the STDEVP function in Excel as per the note in AmiBroker function description?
http://www.amibroker.com/guide/afl/afl_view.php?id=143 Mike --- In [email protected], "ramoncummins" <ramoncumm...@...> wrote: > > Hi There > > I am trying to calculate the standard deviation of the high,low and close > prices for the last twenty days. In effect I wait the stdev of 60 pieces of > data (20days * 3 data points). For reference, I am trying to replicate > highlighting 60 cells in excel and calculating stdev on them. > > I've thought about combing the h,l,c arrays but don't know how to do this. > > Please note that neither of the following are correct: > > stdev(H+L+C, 20); > (stdev(h,20)+stdev(l,20)+stdev(c,20) / 3); //this produces similar result but > not *exactly* the correct result > > Any help much appreciated. > > Cheers > > Ramon >
