Do not trust any stock trading discussion groups. Stocks are a zero-sum transaction. The money you make is the money lost by others. All online trading groups, especially WeChat groups, are designed to gather retail investors to operate in the same direction at the same time, while the group owner or the convener will operate in the opposite direction, because only in this way can he make money. A healthy stock market requires everyone to have different trading strategies so that everyone has the opportunity to make money. If everyone follows the same trading strategy, then this trading strategy or reference indicator will become invalid, because big funds will grab all retail investors and catch them all in one fell swoop. Retail investors buy and sell, so it is difficult for the main funds to determine the direction of operation, and retail investors will have the opportunity to make money from the main funds.