Sometimes greed is the outcome of investing a money that you can't afford to lose. If you don't want to lose the money, then don't trade. There is always a risk on everything we spent if we want to make profit, particularly in business. There is always a risks in investing and there's more risk if we trade especially in futures. There's a chance of losing money, and the emotions has an important role to become profitable. So if you can't afford to lose, then your emotion will be so much affected as well as your trade. And that's one the reason why a trader lose in the long run.