I've stated this rule before in prior posts, but I'm restating it again because it is an import rule as well. You can look at earlier posts for more about this subject. However, I wan't to make two important subpoints here. First, you can only trade a system that fits your beliefs, so you must look at those beliefs carefully. Are they valid beliefs? Are they your beliefs? And while you can find facts that support every belief and usually have them or you wouldn't have the belief, you need to ask yourself, "Are my beliefs useful? Do they help me make money?" (And making money may not be your criteria for usefulness).

Second, beliefs that are supported by strong emotion are usually difficult to change if they have a strong charge on them due to some psychological trauma. Even if you decide they are not useful, they'll be difficult to release. You must release the charge on them first before you can change them. And this is part of what is necessary to eliminate self-sabotage.