Todd et. all,
I am starting to look at and analyze/test the effects of common objective MTP filters on the overall expectancy of the results over a long period of time. I expect the experiment to last a year or so with usable results coming as early as 4-6 months.
I agree with you in that each event (trade) is independent so one could not predict the outcome, but a trader can look at past results to get a good idea of what would most likely work out better in the future. For example, I looked at the average expectancy (R-Multiple) per trade on results from 7.26.2004 to 7.22.2004 attached in another post on the board here and found the following...
3 Min. ES, NQ, YM E-Mini's Average R-Multiple/Trade: 0.494 (327 Trades)
3 Min. ES, NQ, YM E-Mini's Cumulative R-Multiples: 161.75 (99% of Total)
3 Min. ES, NQ, YM E-Mini Total Trades: 327 Trades (70% of Total Trades)
5 Min. ES, NQ, YM E-Mini's Average R-Multiple/Trade: 0.009 (138 Trades)
5 Min. ES, NQ, YM E-Mini's Cumulative R-Multiples: 1.25 (1% of Total)
5 Min. ES, NQ, YM E-Mini Total Trades: 138 Trades (30% of Total Trades)
Because of this large discrepancy I am currently only trading the 3 Minute Signals. Granted there will surely be some 5 minute trades that would end up being profitable that I did not look at based on the past history but I am ok with that since I know that over the long run I should get somewhere around 99% of the expectancy with 30% less data entry, scrambling to get orders entered, commissions, slippage etc. Assuming a $20k account and only 1 contract traded on the 138 5 minute signals (I fully understand this is incorrect position sizing and totally wrong, but it is an intentionally low assumption to make a point) and $5/side commission, this would reduce your return for the year by $1,380 or roughly 6.9 percentage points. Assuming a $20k account and an average of ~7 contracts (taken from Matt's current RT results here-
http://www.mtptrader.com/showthread.php?p=5055#post5055 ) traded on the 138 5 minute signals and $5/side commission, this would reduce your return for the year by $10,253 or 51 percentage points. Certainly a trader could choose to take all of the signals, shown above but I do not fully understand why they would take them if they understand the above results.
It will surely be interesting to see how things work out in the analysis I will be conducting to see if any 'filters' work in the same manner as the data shows above.
Also, any questions/comments are appreciated especially since it is difficult for me to explain this in a web bulletin board setting.
Regards,
Eric