"The problem is all inside your head/ she said to me" is how Paul Simon starts his 1975 hit, for there must be fifty ways to leave your lover, he speculates. He was not crooning about trading, but he might well have been. Unless you are a systematic and highly disciplined trader, you have probably discovered fifty ways to exit a trade. Well if not fifty, surely more than ten. The actual effect is to shorten the length of your average trade and thus possibly degrade your ratio of average winning trade to average losing trade. But why is this significant? Let me offer a simplified explanation.