Richard Dennis was a legendary commodities trader who believed that trading was a learnable skill. He put his beliefs to the test by teaching a group of ordinary people, dubbed the "Turtles", how to trade. He believed that if he could teach a group of people with no trading experience to become successful traders, then trading was indeed a learnable skill. His philosophy focused on teaching not only the mechanics of trading, but also the trading psychology needed to succeed. He taught the Turtles to control their emotions and be disciplined in their trading. He also taught them to focus on following their trading plan, no matter what. He believed that while a trading system may be profitable, it's the trader's emotions and discipline that will ultimately determine success or failure. As such, Richard Dennis' focus was on teaching traders the proper psychology needed to succeed in the markets.