Forex Software — Why there is 50 000 Bars limitation?

Re: Why there is 50 000 Bars limitation?

null@example.com (nixjoe) — Thu, 25 Feb 2010 05:31:54 +0000

Popov wrote:

The max bars limit is set in the config.xml file.
If you want to experiment with larger data set, increase:
 50000
After that you can adjust the current max bars limit from "Data Horizon" dialogue.
Two problems may arise:
- program slow down
- out of memory error (500000+ bars)

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Re: Why there is 50 000 Bars limitation?

null@example.com (chief2000) — Thu, 14 Jan 2010 13:31:33 +0000

BTW, with Metatrader we can optimize 10 years of history using 1 MIN bars on any timeframe and it takes only 30-50 MB of memory during optimization. This is because it does not keep all bars in memory. There two independent parameters:
1. number of bars in history (999999999...)
2. number of bars in window (65000)
And tester allows to show all trades on the whole history.

Re: Why there is 50 000 Bars limitation?

null@example.com (chief2000) — Thu, 14 Jan 2010 13:20:44 +0000

Two years of history with 1 MIN Bars on 15-30 MIN timeframe worked fine. I put 7 000 000 Bras limitation in the config file, but in reality there ~1 100 000 Bars will be used (as I remember). I didn't optimize tens of indicators at once (and I did not use so many indicators). Rarely it crashed on memory, but I had the same problem with 50 000 Bars limits too (maybe because of some other heavy processes).
The biggest problem with FSB is that I couldn't test there different exits strategies (and there is no Break Even), so meanwhile I returned to programing with MetaTrader (looks like Break Even will be added in the next release).

zenoni wrote:

Hello chief2000, please tell more about your experiences and experiments with 4 GB of RAM. How much bars can you incude without problems with 4 GB of RAM ? At what point does the problems start ? What about the performance ?
The memory limitations of several windows OS's.
http://msdn.microsoft.com/en-us/library … S.85).aspx

Re: Why there is 50 000 Bars limitation?

null@example.com (zenoni) — Thu, 14 Jan 2010 12:02:28 +0000

Hello chief2000, please tell more about your experiences and experiments with 4 GB of RAM. How much bars can you incude without problems with 4 GB of RAM ? At what point does the problems start ? What about the performance ?

The memory limitations of several windows OS's.
http://msdn.microsoft.com/en-us/library … S.85).aspx

chief2000 wrote:

My tests show that FSB works fine with much much bigger amount of Bars, but with 4 GB of memory on PC. But I agree - if anybody has less, than he probably should not increase the number in the config file or limit it in Data Horizon.

Re: Why there is 50 000 Bars limitation?

null@example.com (chief2000) — Mon, 07 Dec 2009 05:58:25 +0000

My tests show that FSB works fine with much much bigger amount of Bars, but with 4 GB of memory on PC. But I agree - if anybody has less, than he probably should not increase the number in the config file or limit it in Data Horizon.

Re: Why there is 50 000 Bars limitation?

null@example.com (Popov) — Mon, 07 Dec 2009 03:21:29 +0000

The max bars limit is set in the config.xml file.
If you want to experiment with larger data set, increase:

After that you can adjust the current max bars limit from "Data Horizon" dialogue.

Two problems may arise:
- program slow down
- out of memory error (500000+ bars)

Re: Why there is 50 000 Bars limitation?

null@example.com (Tim_Fx) — Mon, 07 Dec 2009 02:52:31 +0000

When you use large number of bars it may can slow down speed from the platform.

May it is possible to increase number of bars in settings.

Re: Why there is 50 000 Bars limitation?

null@example.com (dino2007) — Fri, 25 Sep 2009 12:52:54 +0000

Yes, I was wondering that too. I was testing a strategy on 5 min. chart and 50000 bars comes to 9 months or so. That is a small sample for testing purposes.

Why there is 50 000 Bars limitation?

null@example.com (chief2000) — Fri, 18 Sep 2009 08:55:12 +0000

Hello,

Why there is a limit for 50 000 bars only?
I think, this is less than 1 year of history on 5 min timaframe.

Thank you!