Yes, buying up and down can make money, but buying up and down can also lose money. Don't think about making money, think about what to do if you do something wrong. This is more important. But I can also tell you that if you do something wrong, it's a single order, stop loss. But the question is, under what circumstances do you judge that you really made a mistake? But if you judge that you really made a mistake, it may also be a misjudgment. If you can't bear to stop loss, you will lose everything as long as you die once, so you must stop loss. But if you stop every time, it won't make you break even, but it will help you lose money slowly, but in the end you will lose everything. And if you don't make a lot of money, you will still lose in the end, because you can't do the past and the future. These problems I mentioned above are actually very difficult to solve! ! Because, in the long run, first, you will make mistakes, second, you will misjudge, third, you may not make a lot of money, and fourth, you may not do what you think. These, can you understand what I am saying?