lets say stock is at 100 and you go long.
You put a stop at 48 because it has not fallen below 50 for well over 3 months and there is lots of support.
Because of the significance of where you put your stop loss, this is why you may choose to reverse for a breakout in the other direction.
Just because you get stopped out does not mean reverse. Like the other guy said... it's all in the plan.