Market Wizards by Jack D. Schwager (pg. 146)

Gary Bielfeldt

The most important is discipline–I am sure everyone tells you that. Second, you have have patience; if you have a good trade on, you have to be able to stay with it. Third, you need courage to go into the market, and courage comes from adequate capitalization. Fourth, you must have a willingness to lose; that is also related to adequate capitalization. Fifth, you need a strong desire to win.