Tj thanks.
But I just want to get this 100% clear so I don't have to come back to
this again.
On exactly the same chart... same settings, same zoom etc... One line
of code requires 5,000 previous bars within a function structure, and
outside of a function structure it requires 500. Why? It makes no
difference if I move around the chart, or zoom the chart etc. The
number of pervious bars required doesn't seem dynamic. It's very much
fixed.
In the case of the following lines,
H1=SelectedValue(TimeFrameGetPrice( "H", inDaily, -1 ));
L1=SelectedValue(TimeFrameGetPrice( "L", inDaily, -1 ));
C1=SelectedValue(TimeFrameGetPrice( "C", inDaily, -1 ));
They require 5,000 bars each. Again, why? Sorry to be thick here, and
I'm sure it's blindingly obvious to you... But I don't see how
BarCount has anything to do with these two examples...??
Thanks Again for taking the time.
--- In amibroker@xxxxxxxxxps.com,
"Tomasz Janeczko" <groups@xxx> wrote:
>
> BarCount is DYNAMIC, it may change with every execution.
> You should not think about it as a constant.
> It can change with zoom factor, tooltip display (uses less),
> interpretation, selected bar, etc, etc.
>
> Also first execution after applying indicator always uses
> all bars, only subsequent runs use less.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "sidhartha70" <sidhartha70@...>
> To: <amibroker@xxxxxxxxxps.com>
> Sent: Saturday, September 20, 2008 1:15 AM
> Subject: [amibroker] Re: Confusing Behaviour...!!!
>
>
> > Thanks TJ. I do know about Quick AFL and I have read that document
> > throughly before.
> >
> > But I can't see how it applies in this case with these specific
> > examples. And I definately can't see the difference between one being
> > inside a function or not.
> >
> > Can you explain?
> >
> > TIA
> >
> > --- In amibroker@xxxxxxxxxps.com,
"Tomasz Janeczko" <groups@> wrote:
> >>
> >> Please read this:
> >>
> >> http://www.amibroker.com/kb/2008/07/03/quickafl/
> >>
> >> Best regards,
> >> Tomasz Janeczko
> >> amibroker.com
> >> ----- Original Message -----
> >> From: "sidhartha70" <sidhartha70@>
> >> To: <amibroker@xxxxxxxxxps.com>
> >> Sent: Saturday, September 20, 2008 12:50 AM
> >> Subject: [amibroker] Confusing Behaviour...!!!
> >>
> >>
> >> > Hi,
> >> >
> >> > I'm trying to get some code to run as fast as possible. As
such
I've
> >> > been studying the 'Display Chart Timing' option under
> > preferences>misc.
> >> >
> >> > I've noticed some behaviour that I can't explain. I hope
others
may be
> >> > able to.
> >> >
> >> > Firstly I notice that when my chart requires 10,000+ bars I
start to
> >> > notice latency in AmiBroker, despite running a very fast PC.
I
assume
> >> > that is normal at that number of bars...?
> >> >
> >> > So here's the problem...
> >> >
> >> > Under normal circumstances my code requires 297 previous
bars.
> >> >
> >> > However, If I add the following lines, the number of
previous bars
> >> > required increases by 5,000 for each instance. So after
these three
> >> > lines of code I am now needing 15,297 pervious bars.
> >> >
> >> > H1=SelectedValue(TimeFrameGetPrice( "H",
inDaily, -1 ));
> >> > L1=SelectedValue(TimeFrameGetPrice( "L",
inDaily, -1 ));
> >> > C1=SelectedValue(TimeFrameGetPrice( "C",
inDaily, -1 ));
> >> >
> >> > Even stranger, when I add the following line of code into
the main
> >> > body of code,
> >> >
> >> > test=((BarCount - 1) - LastValue(TroughBars(L,
0.05,10)));
> >> >
> >> > It adds 500 bars to my previous bars required (total new
797).
> >> >
> >> > However if I call a function and simply return the
following,
> >> >
> >> > return ((BarCount - 1) - LastValue(TroughBars(L,
0.05,10)));
> >> >
> >> > It now requires 5,000 previous bars instead of the 500
outside
of the
> >> > function (total now 5,297).
> >> >
> >> > Can anyone explain this behaviour...?
> >> >
> >> > Many Thanks
> >> >
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > 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.
> >
> > 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
> >
> >
> >
>