Not enough discipline
Discipline is one of the basic qualities that every trader should learn right from the start. That is why business plans and diaries are created so that we have a fundamental basis for everyday trading. If you've read all the previous mistakes we have mentioned, you may already see a pattern here. Changes in strategy, ego, fear, diaries, consistency, it all ultimately stands and falls on a discipline whose task is to connect all these qualities and bring a soothing calmness into an unstable mind.
Theoretically, it's very easy to say that I will stick to a business plan and open and close stores only if strategy allows. In practice, however, we cannot completely eliminate emotions, and after a series of losing trades, we embark on trades that are against the plan, do not use stop-loss, choose too large positions, or do not prepare sufficiently for all possible scenarios.
How to avoid this mistake
If you stay disciplined, you can't blame anyone but your strategy because you're doing everything right. Loss is much easier to accept if you are able to say that you have done your best.