I agree.
Quote from ProgrammerGuy:
The tradestation code uses no slippage, however I do my testing is a custom programming language where slippage and commissiones is accounted for and is determined by the formula of (Currentask - currentbid) / Currentbid * 100 + (.005 / price ) / price * 100,
I have a database of all these listings for many many time frames on many many different markets.
As for the jack hershey methods... I only choose (1) to base the strategy on.
I'm just posting it to show, that it may be possible to create a winning strategy out of JH's logic.