Why you need to keep a trading journal? Trading is all about being disciplined. Successful traders don’t have any holy grail of systems or indicators. What they have is a lot of common sense and discipline. The importance of keeping a trading journal cannot be overemphasized if you want to become a successful trader. This is how hedge fund managers train their new traders. No doubt, leading banks are able to train and breed successful and pro traders using this simple strategy of inculcating the habit of keeping a trading journal and being disciplined in trading.