The one with larger reaction fluctuations in macd is the fast line, the one with gentle fluctuations is the slow line, the black and purple lines in the k line are the fast line, and the yellow and blue lines are considered slow lines

MACD It is called the Similarity and Difference Moving Average, which is developed from the double exponential moving average. The fast exponential moving average (EMA12) minus the slow exponential moving average (EMA26) is obtained by subtracting the fast exponential moving average (EMA26), and then using 2×( Fast line DIF - DIF's 9-day weighted moving average DEA) to get the MACD column. The meaning of MACD is basically the same as that of the double moving average, that is, the dispersion and aggregation of the fast and slow moving averages represent the current long and short status and the possible development trend of the stock price, but it is more convenient to read. When MACD turns from negative to positive, it is a buy signal. When MACD turns from positive to negative, it is a sell signal. When MACD changes at a large angle, it means that the gap between the fast moving average and the slow moving average widens very quickly, which represents a change in the general market trend.