Something I tried a while ago was printing out historical line charts, of daily closing price, for stocks, spanning several months. I picked stocks which moved quite a lot
*. (I haven't got the time for intra-day trading, so using a chart of daily closing price and holding for a few days or weeks would suit me.)
Then I put an
X on the line for every day where, if I'd gone Long:
a) it would have showed an immediate profit within a day or so
AND
b) I could have put a very tight stop on it (ie. low risk entry)
AND
c) I could have made a 10% profit fairly quickly, without getting stopped out
I repeated the exercise with
X for Short.
The results were quite interesting.
* there's no point picking non-movers if you want to make a fairly quick 10% profit