How to use MACD indicator line

Indicator description
DIF line: the difference between the short-term and long-term exponential smoothing moving average of the closing price;
DEA line: M-day exponential smoothing moving average of DIF line;
MACD line: the difference between DIF line and DEA line, colored columnar line;
Parameters: SHORT (short term), LONG (long term), M number of days, usually 12, 26, 9.
usage
1. DIF and DEA are both positive, and DIF breaks through DEA upward, which is a buy signal;
2. DIF and DEA are both negative, and DIF falls below DEA, which is a sell signal;
3. The DEA line deviates from the K line, signaling a market reversal;
4. Analyze the MACD columnar line. If it changes from red to green (positive to negative), it is a sell signal; if it changes from green to red, it is a buy signal.

Generally, DEA is dominated by bulls above the 0 axis, but the stock market is related to many factors, so this indicates a reference indicator