The disadvantage of institutions is that they have a large amount of funds, and there must be a stage of building positions, which will lead to little price fluctuations. They cannot chase the car, and they cannot make money by chasing the car. Therefore, when we judge the reversal in the decline, we only need to wait for the market to obviously have no volatility. Basically, it has reversed. This is a relatively simple method of technical analysis. You can refer to it.