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Backtests and live results way off
Started:October 21st, 2010 (03:13 AM) by lookOutBelow Views / Replies:3,646 / 23
Last Reply:October 22nd, 2010 (05:13 PM) Attachments:0

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Backtests and live results way off

Old October 22nd, 2010, 12:26 PM   #21 (permalink)
Elite Member
Lubbock TX
Futures Experience: Intermediate
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I do all my development during market hours on a separate computer so I don't have that problem.
I have 4 computers now and only one is my live trading and 2 are sim trading, one is development.

lookOutBelow View Post
I may of stumbled across the problem. If at the very least, I stumbled across another problem that affects running strategies.

It appears that Ninja Trader FREEZES whenever you do certain backtesting operations. Even compiling a code will freeze quotes. And when I've been heavily backtesting and writing/compiling code over the last weeks, it seems to have been severely affecting my backtest vs live/sim results.

I don't know that this is the sole issue with the problem I've been having. But it certainly must be a serious issue.

It is a sad day if we cannot backtest/compile code/etc while running strategies during market hours. That is a serious blow to getting any work done.

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Old October 22nd, 2010, 01:48 PM   #22 (permalink)
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Futures Experience: Master
Platform: Marketdelta and Ninja
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Yea.. I've talked about this many times before. I track cum delta, and when i even update/refresh a chart, or open/edit a code, ninja has a little mini freeze, where it causes the gomrecorder to not record incoming ticks. It affects everything on the charts. Hell, when i connect to zenfire it even causes everything to hang for 2 seconds( use it as a second connection).... That just doesn't seem to make any sense to me. I do want to know that it doesn't do that with a TT-fix connection, thought that was funny since ninja was made for zenfire. Some may say that 2 second hang is not a big deal, but it is when using non-time based charts where every little tick counts.

One thing youll have to live with when using ninja is that its extremely finicky, you change one setting or do anything, you'll get undesired results. You have to open the program with everything set to default and just watch You can look, but no touch.

I think multicharts is nice, but they lack the indicators than ninja currently offers. Only program that i think is stable and worthy is market delta, but i heard that its not so good with back testing. Hope this helps.

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Old October 22nd, 2010, 03:50 PM   #23 (permalink)
Trading Apprentice
San Francisco, CA
Futures Experience: Advanced
Platform: inhouse
Favorite Futures: equities
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MWinfrey View Post
I do all my development during market hours on a separate computer so I don't have that problem.
I have 4 computers now and only one is my live trading and 2 are sim trading, one is development.

Of course, you are right that I should be doing that. Since I have a 4 core computer as my main system, I figured it wouldn't be a problem. Didn't realize that this freeze was taking place that often with so many different operations. When it comes time, I'll set another computer up to run by itself with no interference.

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Old October 22nd, 2010, 05:13 PM   #24 (permalink)
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MWinfrey View Post
As I write this, I'm recalling a possible reason for the problem is the way we get tick data. I think the reason I got was that the timestamp on live tick data isn't the same as historic data for tick based bars.
Mike Winfrey


This is a universal issue with all retail platforms.

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