20 Most Common Trading Mistakes reveals market mishaps from some of the biggest names in trading. Everyone - from stellar traders to complete novices -- can use help learning how to trade in the black. Why not learn from the masters how to turn blunders into profitagonising endlessly over when to enter or exit a trade trading like a maverick, risking too much of your capital beating yourself up when a trade goes against you losing $1 million in a single trade clicking 'buy' instead of 'sell' buying 10 000 units when you only meant to purchase 1000