If ordinary people want to make money in the secondary market, they must choose short-term trading. Only by accumulating enough experience in a limited time, energy and funds through short-term trading (just like doing homework in school) can they form a correct and in-depth understanding of the market.
Short-term trading is just a means to hone skills and a stepping stone to understanding the market. In the end, it is still necessary to rely on band operation, trend trading or value investment to achieve long-term profits.
