You may have developed or purchased a system for day trading or longer term investing which makes incredible profits in real-time paper trading. However, you will find that it is not easy to successfully implement even the best trading system when you commit real money to it until you successfully control all of your internal demons which work against your own success. While the primary forces underlying market behavior are fear and greed, the primary cause of unprofitable trading is IMPATIENCE. The only way to successfully trade using any daytrading or investment system is to have the patience to unflinchingly trade according to the system’s trading rules. Read more in Patience Is the Key to Profitable Trading Systems.