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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
--- In amibroker@xxxxxxxxxxxxxxx, "William Peters"
<williampeters@xxxx> wrote:
> Jayson,
>
> This exploration demonstrates summing volume for for last 2 up
days. You
> should be able to do the rest, let me know if you need anything
more.
>
> x = 0;
> for( i = 1; i < 3; i++ )
> {
> x = x + ValueWhen( C > Ref( C, -1 ), Volume, i );
> }
>
> Filter = 1;
> AddColumn( x, "Sum" );
> AddColumn( ValueWhen( C > Ref( C, -1 ), Volume, 1 ), "1st Up Day" );
> AddColumn( ValueWhen( C > Ref( C, -1 ), Volume, 2 ), "2nd Up
Day" );
>
>
> Regards,
> William Peters
> www.amitools.com
>
>
> > -----Original Message-----
> > From: Jayson [mailto:jcasavant@x...]
> > Sent: Wednesday November 26, 2003 2:18 PM
> > To: 1ami
> > Subject: [amibroker] sum only positive days
> >
> > I cannot seem to get my mind around what should be a fairly
simple thing
> > to code. Perhaps someone could nudge me in the right direction.
> >
> > I want to sum the volume of the last 20 up days and compare it to
the
> > last 20 down days. This is not to be confused with summing the up
days
> > of the last 20 bars, Simple code such as plot( c>ref(c,-
1)"",4,2);
> > will plot just the up days and x=iif(c>ref(c,-1),v,0) can
calculate the
> > volume but how do I sum the last 20 bars where x>0 as opposed to
summing
> > the last 20 bars of X ?
> >
> > TIA
> >
> > Regards,
> > Jayson
> >
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