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It would appear that you have misunderstood the return value of
BarsSince. BarsSince returns an array, not a scalar. So in the Buy1
case, you are not passing the simple value that you might think you
are. You would have to pass something along the lines of Ref(y, 0) to
pass the current value of y, and thus be a fair comparrison to
passing the scalar -5.
http://www.amibroker.com/guide/afl/afl_view.php?id=23
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "chorlton_c_hardy" <chorlton-c-
hardy@xxx> wrote:
>
>
> Hello Tomasz,
>
> If Ref() accepts variable periods, can you clarify why the code
below
> doesn't work?
>
> x = IIf(H == HHV(H, 30), 1, 0);
> y = BarsSince(x);
> y = y*-1;
>
> Buy1 = x AND AccDist() > Ref(AccDist(),y);
> Buy2 = x AND AccDist() > Ref(AccDist(),-5);
>
> PlotShapes( shapeUpArrow*Buy1, colorGreen, 0, L, -10 );
> PlotShapes( shapeUpArrow*Buy2, colorBlue, 0, H, -10 );
>
>
> The Buy2 signal will plot with no problems but the Buy1 signal
won't.
> I assumed this was because of the variable y in the Ref() function.
> However, if Ref() can accept variables then can you explain what
I'm
> doing wrong?
>
> Any help much appreciated,
>
> Chorlton
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
> wrote:
> >
> > Ref accepts variable periods So all these workarounds are not
> required.
> >
> > Ref( C, -x ) works perfectly fine.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: "dbwyatt_1999" <dbw451@>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Saturday, November 10, 2007 3:30 PM
> > Subject: [amibroker] Re: Passing a variable into the Ref()
function
> >
> >
> > > Variables are arrays in AB, so Ref(Close,-x) probably would not
> > > work. If you have a predefined set of values for x, you could
> use
> > > iif statements:
> > >
> > > myValue = iif(x==5, Ref(C,-5), iif(x==10, Ref(C,-10), iif
(x==15,
> Ref
> > > (C,-15),Null)));
> > >
> > > However the best way to access variable array index offsets is
to
> use
> > > a loop:
> > >
> > > i = 0;
> > > x = Param("x",10,1,100,1);
> > > for (i=x; i<BarCount; i++) {
> > > myValue[i] = Close[i-x];
> > > }
> > >
> > > Regards,
> > >
> > > David
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "chorlton_c_hardy" <chorlton-
c-
> > > hardy@> wrote:
> > >>
> > >>
> > >> Hello All,
> > >>
> > >> With regard to the Ref() function in AB, is there any way to
> pass a
> > >> variable into it rather than using a specific value?
> > >>
> > >> For example:
> > >>
> > >> Rather than writing Ref(Close,-10), I want to write Ref(Close,-
> x)
> > > where
> > >> x has been defined earlier in my code.
> > >>
> > >>
> > >> Thanks in advance,
> > >>
> > >> Chorlton
> > >>
> > >
> > >
> > >
> > >
> > > Please note that this group is for discussion between users
only.
> > >
> > > To get support from AmiBroker please send an e-mail directly to
> > > SUPPORT {at} amibroker.com
> > >
> > > For NEW RELEASE ANNOUNCEMENTS and other news always check
DEVLOG:
> > > http://www.amibroker.com/devlog/
> > >
> > > For other support material please check also:
> > > http://www.amibroker.com/support.html
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> >
>
Please note that this group is for discussion between users only.
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