Indeed, you don't trade on impulse, discipline trumps carelessness, refrain from entering at close to an all-time high or low, the chances of breaking the high or low significantly enough to make it worth the risk is low while the probability of a reversal at those points is high. No one is twisting your arm to enter a trade, sometimes it's best to wait and see what happens next before entering, regardless of what the charts tell you.Define a high or a low. That's the real trick, isn't it.