What are the classic and practical theoretical skills in the stock market? What is the difference?

The specific differences and contents of these two famous stock market theories are as follows:

1 is the theory of zero-share trading. The so-called zero shares refer to transactions that are not satisfied with one hand. Share prices in the United States are generally high. If every transaction needs one hand, many retail investors can't buy it, so there are people who specialize in zero-share trading. The theory of zero-share trading is to judge the market by whether the zero-share trading is active or not. If the buying of zero-share trading is very active, it means that the market is coming to an end, and vice versa.

2. There are also major market measurement theories. When the proportion of positions held by the main institutions reaches a peak, or when the main institutions are optimistic about the market outlook, it means that the market is over; On the contrary, it means that the market is coming to an end.