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Re: [amibroker] Re: Is there anyway to limit number of bars to load to save CPU power



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Jack (wonet2001)
 
Fred's IO writes a new watch list of equities under consideration and prefixes them with ~~ .  They are shortened to the number of bars under study. 
 
Also, I recall that on earlier versions the current symbol affects the number of bars being processed.  You may want to experiment with this
to see if this helps, or write to AB support.

Regards
Joe
 
 
 
----- Original Message -----
Sent: Monday, December 03, 2007 12:28 AM
Subject: Re: [amibroker] Re: Is there anyway to limit number of bars to load to save CPU power

Ron --
I believe you are correct.  I haven't tried it for explorations.  But I have for back testing.  Back testing takes the same amount of time whether you do it for the last 30 days or the last 3 years.  It also takes much longer for the first time you run it than for following times, because much of the data is cached from the first time (assuming your computer hasn't been very busy between the two backtests and you have lots of RAM).

I believe that Fred Tonetti's IO runs as fast as it does because he writes a new temporary data base with just the number of bars that IO will need.  I hope someone corrects me if I'm wrong.
-- Keith

Ronald Davis wrote:

Please correct me if I am wrong, but I think that if your exploration  looks back at the most recent 100 days of data, then it will run the fastest if your trading database is only a little larger than the 100 days of data that you are analyzing.    
 
If you have 1000 days of data, your  exploration of only 100 days will examine all 1000 days worth of data  will take longer.  Ron D
 
 
 
----- Original Message -----
Sent: Sunday, December 02, 2007 8:10 PM
Subject: [amibroker] Re: Is there anyway to limit number of bars to load to save CPU power

Go to Tools > Preferences > Miscellaneous and check Display chart
timing(advanced) and see which custom indicator is causing your
problem.

--- In amibroker@xxxxxxxxxps.com, jack <wonet2001@x..> wrote:
>
> "number of bars" in database setting won't do the trick, I have
five customer indicators on four charts at the same time, it offen
maxed out my CPU, causing other programs sluggish, is there anyway
to save CPU power?
>
> can I solve the problem by calculating customer indicators on a
limited number of bars instead of whole bars? appreciate any
guildline on this topic.
>
>
>
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