In fact the ability to accept a loss and close the order is what can save your account at the end of the day. If you are 20 years old lad who has plenty to learn and lose in his life, you may actually keep going. But if you have a family and you trade for a living, even if as a dealer at a bank, you may find yourself closing the losing orders faster and more often. It is really a psychology thing. A very good example by FxMasterGuru about the huge loss when keeping a losing position.