Quote from oldtime:
...The simple use of stops can protect you against bad luck and open you up to good luck. So theoretically, even if you are just guessing, you have limited loss and unlimited profit potential.
This is the key to good profit in my opinion and this brings the old saying of "let winners run" to its bare basics.
As someone above posted the key to trading is the stop loss placement. I would agree completely but I would also add "exit management" in general which would encompass not only stop loss orders but also exiting winning trades correctly.

