The market will open higher or lower mainly because of bad or bullish news. Another thing is that if the market plummets today, it will basically open lower the next day, and vice versa.

Generally speaking, if the market index and individual stock prices open too high or too low, they may fall or rise within half an hour. If they open high but do not fall back, the trading volume will be large, which is a strong performance. The strong stocks jump upward continuously to attract more small and medium-sized retail investors and a large number of short-term customers to enter the market, and the main force achieves its goal of slipping away; the stock price opens higher in the early stage of rising or on the way up, and then moves lower, which is the behavior of the main force to wash the market and attract funds; there is another kind of behavior The stock price opening high is a bullish behavior, causing high opening and flight, which is called opening high and moving low.

The rising stock price opens low and moves high, which is the main force's short-selling behavior. Generally, it will not open low and move low. In the early stage of the decline, when the stock price opens low, it is leakage, and it may jump downward or continue to jump short. , causing the stock price to fall beyond recognition; gapping short and opening low at the end of the decline is a signal of bottoming out and rebounding.