Quote from MarketException:
Yes I trade with real money but I have not kept 100% discipline in trading all the signals exactly the way they are. Sometimes I improvise based on market actions. I generally do a bit better than the signals in my real money account, although I do not keep track of the difference.
I keep track of past performance and deduct 1 tick slippage and $5.00 commission per each rt trade, even the losing ones.
Most of the trades don't have any slippage. Trade at open usually has some slippage but occasionally I get a positive slippage as well.
If the price is hit without going through it, I consider it filled. I realize that this is not realistic, however based on the past performance, the sum of the [unused]slippages pay for occasional trade that has a questionable fill.
I found this method to be both realistic and practical. If you have any other suggestions, please let me know.