Re: [amibroker] Sum Reference Not Same as Simply Adding Previous Data Points Manually

[Tomasz Janeczko <groups@xxxxxxxxxxxxx>]

Hello,

Your "manual" version is incorrect. Should be:

VolumeSumA[ i ] = Volume[i-1] + Volume[i-2] + Volume[i-3];


http://www.amibroker.com/guide/h_understandafl.html


Best regards,
Tomasz Janeczko
amibroker.com

On 2010-03-05 17:43, 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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------------------------------------

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