have you tried:
VolumeSum = sum(Volume, 3);
VolumeSumB = ref(VolumeSum, -1);
On 3/5/2010 5:43 PM, davemabe2000 wrote:
> I'm trying to add the volume of the three previous bars (not including the
> current one) in my backtest.
>
> If I sum them up "manually" I get one value:
>
> VolumeSumA = Volume[i-1] + Volume[i-2] + Volume[i-3];
>
> But when I try using Sum and Ref to do it I get a different value for some
> reason.
>
> VolumeSumB = Sum(Ref(Volume, -1), 3);
>
> But VolumeSumA != VolumeSumB.
>
> What should I be using for Sum and Ref to get it to work properly and equal
> VolumeSumA above?
>
>
>
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