Similarly to RSI, the MACD simply doesn't work. Well to be totally fair, the RSI does work in very rare instances but you really have to know what you are doing and have a very specific strategy set in mind.
Oscillators like MACD and RSI are particularly weak indicators because they can't distinguish between range and trend, so following them alone is often a death trap. However, if you use multiple approaches (like candlestick, volume, and MA analysis) in addition to oscillators and look for confluences of bullish/bearish signals, they can be useful at times.
No single indicator should be followed on its own.
MACD using smooth techniques so its is for range, not trend. Average range of price over a range of observation time. This one is a very delayed indicator, and should not be used for tradings. It is the same for Bollinger bands, that are another trap for inexperienced traders. Price likely move ups and downs in bollinger bands, but when whales decide to manipulate price, upper or lower bands will be broken fastly. I don't use MACD, RSI, and bollinger bands.