OmniTrader Pro Resource Forum
OmniTrader Pro Technical Support
re strategy wizard
17 replies, 1593 viewings
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OmniTrader Pro Resource Forum
OmniTrader Pro Technical Support
re strategy wizard
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Last Activity 4/23/2025 7:30 PM 17 replies, 1593 viewings |
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mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld  User Profile |
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| Jim Dean Sage     Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
You need to be sure that the historical data loaded onto your machine goes back far enough. Go to Edit > Data Periods, and make sure that you have at least: for 5min tests: 390min/day / 5m = 78 bars/day 6/4/09 = about 1 year ago = 260 days * 78 bars = 20,280 bars for 2min tests: 390min/day / 2m = 195 bars/day 260 days * 195 bars = 50,700 bars I have done a LOT of experimentation with large numbers of data periods. It IS possible to get this quantity to work, but KEEP YOUR FOCUS LIST SHORT (50-100 ... not 2000), and before you do any testing, CHECK that the full data has been downloaded for all symbols. Do this by opening a chart in the timeframe you want, and then click the All periods-view button. Then PgDn through the full focus list. You might need to wait a pretty long time, initially, to get the data sucked in from the Server. | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
Wow - those are excellent questions, both of them ... but the answers are really pretty long (at least if you want GOOD answers :~) I've written quite a bit about optimized backtesting on the N forums ... do a search under Jim Dean for the string "backtesting" in subject and body, in the OT and OTPro and NClub (if you are a member) forums, and you'll find plenty to consider. I've also written a lot about time periods (ie bar-lengths) ... but I'm not sure what would be the best thing to search on. A few nutshell considerations about time periods: 1. shorter bar-lengths require stocks with higher liquidity to avoid bad slippage ... so, if you're willing to "bullseye" a short FL of highly liquid stocks, then you can use fast bars like 1-3 min. If you want a broader FL universe to select from, you'll need to use longer bars (15-60m) and permit lower liquidity thresholds in your searches. 2. if your trading is HIGHLY automated/mechanized, so that you don't have to "think" much in order to execute, then you can consider using fast bars ... but if you prefer to ponder things and be more deliberate about your trading, then to AVOID EMOTIONAL PITFALLS (fear/greed), you should pick slower timeframes. 3. If your personality &/or lifestyle tends to contain a frequent bouts with stressfull situations, or lots of distractions, then my strong recommendation is either to not trade at ALL during those times, or limit your trading to daily bars. This is a VERY serious and important recommendation. Read books by Van Tharp and Mark Douglas for more about psychology of trading. Muy importante! Summary ... thar jest ain't no rite ansur fer evrybudy! [Edited by Jim Dean on 4/14/2010 10:52 AM] | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
how many symols in your focus list? how many strategies are active? there are other considerations but this is a good start ... | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
You've answered your own question, when you told me: "every thing was working fine until I changed from a floating time period to a fixed time period" That would have been one of the suggestions I'd make to figure out the solution. So, apparently that DOES make a difference. Not sure why ... my GUESS (fairly well "educated") is that OT is processing ALL the bars in-between the two windows, but IGNORING the results of the middle portion. That would eat up extra time. This would be necessary since OT needs to know what trades are "in force" at the start and end of each period. In fact, OT might be going through the ENTIRE history TWICE, for that same reason. One of the programmers would have to clarify. HOW to speed it up, yet MAINTAIN the separate periods? 1. try using fewer strategies, if you can ... or cut back on the number of systems in the strategies, if multiple in some. 2. make sure data periods are the shortest possible that permits your history to work 3. turn off RT during the backtest so that the HRE bar is not continually trying to update 4. turn off or minimize auto-optimization in the strategies. OR ... if all else is inadequate ... 5. buy a faster computer ;~> [Edited by Jim Dean on 4/14/2010 2:36 PM] | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
I use a separate machine for SW testing, btw. Up2U ! | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
That way you can use the main computer to trade with in RT, without having to pay for the data twice. Check with Nirvana re computer specs ... if you're buying a second machine for this, pocketbook limits it probably. I'd say $1500 worth of decent desktop would do it. Make sure you have at least 4G Ram! Re fixed time period ... since RT will not be active during SW tests, yes the time period will be fixed. That will make things go faster as well. BEFORE buying a new machine ... try this at night ... maybe SW will be able to complete its run from 7p to 7a, and there will be no issue. | ||
| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
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| mark g Member Posts: 9 Joined: 8/7/2006 Location: cairns qld User Profile |
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| Keith Parsons Member Posts: 47 Joined: 6/5/2012 Location: Durban, RSA User Profile |
Working my way thru SW3 web page / manual / TradeTight threads / OTPro threads. Q1) I understood SW3 is only for EOD. This thread tells me its also on R.T. I had a problem in the very begining using R.T. Q2) I have OT Pro set up on two (2) PC's. When u test SW on your seperate machine are you able to run the other machine ? i.e. do you have two (2) seperate data feeds. I am not able to run BOTH my machines at the same time as I only have one (1) data feed. NB: Have Prado & Van Tharp books. As always, Thank you. NB: At this particular time my families prayers go out to all OT users and families who are in the area of Sandy. TAKE REAL CARE | ||
| Jim Dean Sage Posts: 3433 Joined: 3/13/2006 Location: L'ville, GA User Profile |
Since a TP holds any intraday bars you need for SW, and since it is NOT running in a realtime environment, it can run on a separate machine, WHILE you are running OT with RT on your main machine. No extra exchange fees needed, since there is only ONE connection. [Edited by Jim Dean on 10/29/2012 10:50 AM] | ||
| Keith Parsons Member Posts: 47 Joined: 6/5/2012 Location: Durban, RSA User Profile |
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