Partner of perhaps the best-known futures speculator of our time, Richard Dennis.Created the famous trading group known as the Turtles. William has averaged over 62 percent return.  

“I take the point of view that missing an important trade is a much more serious error than making a bad trade”. 
”Buying on retracement is psychologically seductive because you feel you’re getting a bargain versus the price you saw a while ago. However, I feel that approach contains more than a drop of poison.”
”You shouldn’t plan to risk more than 2 percent on a trade. Although, of course, you could still lose more if the market gaps beyond your intended point of exit.”
”I haven’t seen much correlation between good trading and intelligence. Some outstanding traders are quite intelligent, but a few aren’t. Many outstanding intelligent people are horrible traders. Average intelligence is enough. Beyond that, emotional makeup is more important.”
”The answer to the question of whether trading can be taught has to be an unqualified yes. Anyone with average intelligence can learn to trade. This is not rocket science.”
”If you bring normal human habits and tendencies to trading, you’ll gravitate toward the majority and inevitably lose.”
”Watch idly while profit-taking opportunities arise, but in adversity run like a jackrabbit.”
”One adage that is completely wrongheaded is that you can’t go broke taking profits. That’s precisely how many traders do go broke. While amateurs go broke taking large losses, professionals go broke by taking small profits.”
”What feels good is often the wrong thing to do.”
”Human nature does not operate to maximize gain but rather to maximize the chance of a gain. The desire to maximize the number of winning trades (or minimize the number of losing trades) works against the trader. The success rate of trades is the least important performance statistic and may even be inversely related to performance.”
”Two of the cardinal sins of trading – giving losses too much rope and taking profits prematurely – are both attempts to make current positions more likely to succeed, to the severe detriment of long-term performance.”
”Don’t think about what the market’s going to do; you have absolutely no control over that. Think about what you’re going to do if it gets there.”
”It is a common notion that after you have profits from your original equity, you can start taking even greater risks because now you are playing with ‘their money’. We are sure you have heard this. Once you have profit, you’re playing with ‘their money’. It’s a comforting thought. It certainly can’t be as bad to lose ‘their money’ as ‘yours’? Right? Wrong. Why should it matter whom the money used to belong to? What matters is who it belongs to now and what to do about it. And in this case it all belongs to you.”