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Herman,
this will add the updaysVol of the last 20 bars. Jayson doesn´t want
this, as you may see from the explanation in the initial message.
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "Herman vandenBergen" <psytek@xxxx>
wrote:
> SumVol20updays = Sum((ROC(C,1)>0)*V,20);
>
> herman
> -----Original Message-----
> From: kristaura [mailto:camplevel@x...]
> Sent: November 27, 2003 11:31 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Re: sum only positive days
>
>
> Someday I will learn to write what I think:
>
> "This is my attempt (without using looping) for summing the
volumes
> on the last N up days:"
>
> should read:
>
> "over the last "pds" up days:"
>
> Note: N is a variable and is the number of bars
encompassing "pds".
> kris
>
> --- In amibroker@xxxxxxxxxxxxxxx, "kristaura" <camplevel@xxxx>
wrote:
> > Hello Jason,
> > This is my attempt (without using looping) for summing the
volumes
> on
> > the last N up days:
> >
> > pds=20;
> > up=C>ref(C,-1);
> > N=barindex()-valuewhen(up,barindex(),pds)+1;
> > UpVol=sum(up*V,N);
> > Plot(up*V,"Up Days",1,2);
> > Plot(UpVol,"Sum Up Vol",1,1);
> >
> > kris
> >
> >
>
>
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