Any theory has its theoretical premise, so we must examine the theoretical premise before making a theory suitable. I very much agree with Sina Weibo, the chief stock critic's view on the A-share market. The market is the process and result of all values playing each other! Anyway, if most people in the market think it is applicable, Delta theory will also exert influence in the market. Let's look at the core idea of Delta Theory:

The core idea of Delta theory, also known as Delta Theory, is that our world, including human beings, animals and plants, and all natural phenomena on the earth, such as tides, sunrise and sunset, seasonal changes, etc., are the result of the mutual movement of the sun, the earth and the moon. This mutual movement will inevitably have an impact on people's investment activities. Jim Solomon, the discoverer of Delta Theory, applied this idea to the investment market to find the answer, and found that it was indeed the case. According to Jim and Wilder's research, they participate in all trading markets, including commodity futures, stock market, foreign exchange, stock index futures and so on. (hereinafter referred to as bazaars) abide by this law.

The foundation of this theory is natural philosophy. The weakness of this foundation is that it does not pay enough attention to the influence of people's initiative. People's behavior does have a natural attribute. Therefore, some cycles in delta theory will indeed come true in the stock market.

However, human behavior is more important to form a society, that is to say, people have unique social attributes besides basic natural attributes! Now the Nobel Prize in Economics has been awarded to outstanding people in the field of behavioral finance, which shows that people in top research fields have generally begun to realize that the economy, including the stock market, is obviously more suitable to be explained by behavioral finance theory.

To sum up: the applicability is very low, but the cycle theory inside is a good tool to broaden your horizons! These periodic theories can be used for reference, but don't be too superstitious!