I'm not very proficient in quantitative trading. I only give my own opinion in my understanding: don't make quantitative trading too mythical. Quantitative trading is nothing more than a program developed by people according to various rules of the market. For example, there is a' risk-free' arbitrage between stock index futures and constituent stocks of the Shanghai and Shenzhen 3 Index. There are several problems here: first, there is no perpetual motion machine that can make money by pressing a button, otherwise the international financial giants will quickly suck up the money in the market, which obviously violates logic and reality. Secondly, even if there is a certain risk-free arbitrage space, then the market forces will quickly narrow this space, so that there is no. This little space is not enough for every quantitative organization to survive. Also, the program is developed by people, so there will be places where the cycle is not considered. Long-term capital companies in the United States have two Nobel Prize-winning mathematicians at the helm, and developed a seemingly risk-free money-making program. First, they made some money and were blown into myth, but when the' black swan' with all the hedging factors at the same time appeared, they went bankrupt directly. Before the quantitative tools of Everbright Securities were officially used, one person made a mistake in the test and made him lose hundreds of millions, and the general manager stepped down. Quantitative investment, a so-called tall thing, looks good, but whether it is useful or not, it has nothing to do with you and me. Technical analysis is indeed an indispensable weapon for our profit-making and self-defense. Moreover, the development of technical analysis is progressing, and so is your understanding of technical analysis. Technical analysis is not 1+1=2. The success of technical analysis requires your experience, understanding, sweat and fund management before enlightenment to avoid being swept away. It is not that simple, and it will not be eliminated by the times.