Even if you are a well-trained trader, I think you have to make mistakes because psychology is involved. When I saw Lee Se-dol and AlphaGo's Go match before, I felt a lot.
There are times when I also tend to overconfident, and sometimes I think this is definitely better than I am. However, there is no such mistake in the algorithm trade.
I think the most important point is not to have emotions like humans. Let's keep taking classes!