MACD, called exponential smma, is obtained from the double exponential moving average. The meaning of MACD is basically the same as that of double exponential moving average, but it is easier to read. When MACD turns from negative to positive, it is a buy signal. When MACD turns from positive to negative, it is a signal to sell. When the MACD changes at a large angle, it means that the gap between the fast moving average and the slow moving average expands very quickly, which represents the change of the market trend. Macd has three parts, DIF, dea and Pillar. When all three parts pass through the 0-axis, the meaning can be expressed by three formulas of macd itself: DIF = 0 indicates that the long and short moving averages are crossing; (There are two ema gold forks on the top and two ema dead forks on the bottom) dea=0 indicates that the long and short EMAs are arranged in a long or short position; (Upper wear means two EMA bulls, and lower wear means two EMA bears) Column =0 means diff = dea；; (The upper one is the macd yellow and white line gold fork, and the lower one is the macd yellow and white line dead fork. Returning to the zero axis means that the original trend has flattened and the original change has become smaller.