Emotional stability. You don’t have to be nuts to trade, but it helps!  That is a joke, of course. Emotional stability is grace under pressure. A successful trader must be able to remain calm in difficult situations. Traders that rank very high on the emotional stability scale have very low anxiety levels, remain calm, relaxed, and have a low suspicion level. They tend to be trusting individuals and are not paranoid. You won’t hear them blame the market makers for forcing the stock to hit their stop and they take responsibility for their actions. Successful traders tend to be well
grounded.
 

Discipline. Successful traders are ones that can follow the rules. They are the guys that drive the speed limit. They tend to be perfectionist and take pride in their work. They like to take a project from start to finish and get joy from completing it successfully. Pilots, trained to follow checklists, tend to make good traders. An impulse oriented individual will have difficulty achieving the discipline to become a successful trader.
 

Intelligence. Bill says that successful traders tend to be intelligent. They need not have the IQ of Einstein but they are above average in intelligence. They tend to be good problem solvers and good with numbers, such as statistics. They understand that trading is based on probability, that not every trade will work as planned.