"Regarding "backtesting" - over the years I've found that backtesting tends to lead to a false sense of confidence in a strategy. (Not being critical, it "can" help talk you out of things that may not work). "
i've found the EXACT opposite.
Again, I understand you primarily trade stocks (pairs) whereas I trade futures (I invest in stocks, though).
By backtesting setups, I *know* what their positive expectancy is. I *know* that if I stick with them, they work X% (varies by setup) of the time, for Y points.
On strategies I have backtested, it gives me the confidence to STICK with the trade, and let my parameters take me out (stopped out, or first target met) vs. subjective measures. Once you are in the trade, it is nearly impossible to be objective, since you have a position. You can talk yourself out of a good trade by taking profits too early, or jumping out of the trade, etc.
Since I know my stops and targets and the setup are logical and have positive expectancy (which I learned through backtesting), it gives me the confidence to FOLLOW the setups. This helps with patience - waiting until the setup presents, and letting the setup play out.
I also should note that when I backtest my strategies, I test them using a real market (DIA) as well. In other words, I backtest and forward test.
DIA has inferior fills, and higher commission ($1 per lot, which equals 1 full tick vs. just under $2 per contract which is 2/5 a tick). So, if a strategy works with DIA, I can be assured it works with YM.
DIA is a great training tool for prospective YM traders.