What do you mean by reverse? Individual stocks? If it is a stock, backhand shorting means that the stock price is on the rise, but for some reason, the dealer doesn't want to continue to rise, or wants to collect more chips, or raise the average position cost, so as to calmly rise the stock price in the later period, so the stock price is suppressed downward, which means the reversal of the upward trend! My answer has always been very popular, I hope you understand.