Bottom deviation is a common phenomenon in the stock market, which mainly occurs in the process of stock price decline. When it is in a downward trend, the stock price keeps hitting new lows, and the corresponding kinetic energy column below the 0 axis of MACD indicator is not lengthened, but shortened. This phenomenon is what we often call bottom deviation. In addition to the stock market, it is also common in foreign exchange and gold markets. The bottom deviation shows that the stock has insufficient downward momentum, and the short-selling power is gradually weakening, and then it will usher in a long counterattack. Therefore, when this happens, the market outlook is often bullish. It is also a signal for stock investors to enter the market. Of course, for foreign exchange or gold investors, you can enter the market to do more at this time. After this signal appears, it generally indicates that the market decline is coming to an end. At this time, investors tend to be more optimistic about the market, and the mood of entering the market will also be strengthened. However, in the actual trading market, sometimes there will be a bottom deviation, and after a period of stock consolidation, there will be a sharp decline again. Therefore, in the process of falling, there may be many bottom deviations. Whether investors enter the market also needs to be analyzed in combination with multiple indicators.

The "bottom deviation" indicates that the decline will end. When the stock price index goes down in waves, and DIF and MACD don't go down at the same time, but go up in waves, this is the bottom deviation of the stock price trend, indicating that the stock price is about to rise. If DIF crosses MACD twice from bottom to top to form two golden crosses, the stock price will rise sharply. Bottom deviation generally appears in the low position of the market. When the stock trend is lower than a trough, the stock price has been falling, but the trading volume is no longer decreasing. At the same time, the MACD index has also been uninspired and low, and it has also increased. This is called the bottom deviation phenomenon, which is generally a signal that indicates that the market index may reverse upward at a low level. The bottom deviation is that the stock price did not increase much, but the index rebounded sharply. The stock price keeps hitting new lows or new highs, while the indicators keep rising or falling. In the practical application of global gold exchanges, the deviation of MACD indicators is generally reliable in strong markets. When the stock price is at a high price, it is usually confirmed that the stock price is about to reverse as long as there is a deviation, that is, the top deviation; When the stock price is at a low level, it usually takes many deviations to confirm the bottom deviation. Therefore, the accuracy of the top deviation of MACD indicator is higher than that of the bottom deviation, and investors should pay attention to it.

The bottom deviation form is also an important analysis form to smooth the MACD of the same and different averages, which can correctly judge whether the top deviation of MACD can escape from the top in time. How to use the bottom deviation of MACD to judge the market and find opportunities for bargain hunting is the focus of this paper. Among MACD indicators, there are three output values, one is DIF, the other is DEA and the other is MACD. The methods introduced here are mainly aimed at DIF and DEA. DEA is actually the average trend of DIF, which plays a role in smoothing the trend of DIF and determining the short-term speed direction of DIF together with DIF.