In a market wave, one trade—win or lose—matters only like a drop in the ocean among the million-plus trades of your long career. Don’t get carried away by a single success, and don’t become overly upset or tormented by a single failure.

A calm, steady mind is always the strongest weapon for a professional trader. When, due to changes in the market and your assets, you become impatient, blinded, fearful, and anxious, whether you profit or lose, you have already lost. The market’s waves will endlessly amplify your emotions, leaving you utterly exhausted—then deliver a fatal blow.