If you decide to become a trader or investor, you have to be somewhat competitive. Day traders, especially, recognize that the main reason they win or lose is often a matter of competition. If you are not better than your fellow day traders, you lose, period. Many traders do not know how to evaluate themselves and how well they fit into the world of day trading, so they may go for many years without knowing where they stand. It’s all in your P/L. Competitive day traders gather as much information as possible because they know that day trading is, interestingly, an information management skill. Pros win by taking advantage of uninformed players who rely on amateur decision making. Zero Sum Game (Minus Commission).