There is a very common but rarely seriously discussed phenomenon in trading. When making money, trading is often quite "normal": planned, rhythmic, with moderate position sizes, and stop-losses are executed fairly decisively. But as soon as a few consecutive losses occur, it’s as if the person has switched to a different system. Originally, they only followed one pattern, but suddenly they want to try every opportunity; originally, they kept a fixed position size, but suddenly each trade becomes larger than the last.