Knowing that the market is uncertain, when the market trend is not in line with expectations, we must find an exit point that we can accept, and ensure that the earlier the exit, the better, and the less the loss. No matter how good the trading system is, it will also encounter the situation that the market does not conform to the system. Sooner or later, we have to realize this situation and stop loss as soon as possible. This is a possible way to succeed in the future.
If a person can understand this truth very early and can do it in practice, then it won't take too much time to succeed. If you don't understand it, you can't implement it in place. Even if it is profitable for a long time, it is possible to return the order. If you don't understand at 10, you are unlikely to succeed at 10.