The first point: net trading value. When you buy and sell at the price of 1 yuan, the net value is greater than 1 yuan, which means profit, and less than it means loss.

The second point: whether to pay dividends during the holding period. When you have paid dividends, it is equivalent to getting benefits in advance, and you can know whether you are profitable, including selling individuals.

Buying a fund doesn't need to look at the changes in the net value of the fund every day. When the profit or loss reaches the personal price, you can buy and sell.