I have one more thing, that is, if my entry point is wrong, at this time if I still believe that this point will rise or fall, that is, it is moving in my direction, then I should have a lower limit and an upper limit position, that is to say, if the lower limit reaches a certain point, I will directly clear the position, and I should also directly hang half of the cost price, because the rebound here is not as expected, or I simply did not expect to do so