Usually professional people make mistakes, they do it as an evaluation of themselves. Why is that because of any mistake, because we ourselves started it, for example, when we analyzed until we decided to open a position and when we lost, it was because we were wrong in doing the analysis or we were wrong in opening the position, that's what we have to evaluate, no need to be afraid. There is no need to be embarrassed when we make a mistake. In fact, when we make a mistake and we are successful in carrying out an evaluation, later the error will be reduced, we will be more detailed in getting an accurate trading system.