1. Do it according to the time-sharing chart of funds in the market. T: open the time-sharing chart of ETF. When the price of ETF is lower than the average price or running below the average price, investors can buy it appropriately. When the price runs above the moving average price, investors can sell some appropriately.

2. Do T according to the relationship between the price and the moving average: When there is a moving average to support the price decline, you can buy some in moderation; Conversely, when the rise is suppressed by the moving average, it can be sold.