NT gradually freezes

[binwang2]

Hi NT experts,

I have found my NT gradually freezes quite often after i get into trades. The general observations are:

a) the more orders filled at the same time, the sooner it freezes.
b) the cancellation of associated orders (stop fill cancel target for example) is fast at the begining: 1 or 2 seconds; then it can be 30 seconds to several minutes; then NT reaches "not responding" stage.
c) task manager will show not responding;
e) the broker IB still has TWS up and running on all NT frozen cases.
f) This gradual freezing is quite consistent on 2 PCs, both 1.6 GHz with 1G RAM; one is XP professional an the other XP media.

To help dignosis:
i use manual stop trailing in OnBarUpdate with ExitLong(Short)Stop by changing stop price at tick level. I also use arrays to store orders and loop through them in OnBarUpdate at tick level. Not sure if these will be counted as computation heavy.
example of a): 8 orders filled within 2 secons and NT was frozen in one minute; 2 orders filled at the same time and NT frozen in 20 minutes.

Any idea?

[NinjaTrader_Bertrand]

binwang2, just answered your note sent to support on those topics - would definitely recommend adding RAM or even consider getting a higher performing system for autotrading on tick charts. This is just meeting our min requirements - http://www.ninjatrader.com/webnew/support_installationguide.htm

[binwang2]

Thanks.
NT system requirement does not say supporting window 7. It also does not support 64-bit OS.
Now all new PC are shipped with window 7 and i think most will be 64-bit. Any thoughts?

[NinjaTrader_Bertrand]

We're currently in the process of testing on Windows 7 inhouse, we would expect it performing without issues.

However 64 bit OS are unfortunately not supported for NinjaTrader 6.5, but they will with NinjaTrader 7 -

http://www.ninjatrader.com/webnew/NT7/NinjaTrader7.html