[amibroker] How to combine Arrays? I am trying to calc stdev of H,L,C over 20 days

["ramoncummins" <ramoncummins@xxxxxxxxxxx>]

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



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