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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@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>>
>> Please read this:
>>
>> http://www.amibroker.com/kb/2008/07/03/quickafl/
>>
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>> ----- Original Message -----
>> From: "sidhartha70" <sidhartha70@xxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> 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
>
>
>
------------------------------------
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