The MACD is one of the world's most widely used technical indicators. Invented by Gerald Appel in the late 1970s, it combines two exponential moving averages to visualize momentum and trend changes.
MACD components:
- MACD line: EMA 12 - EMA 26 (difference of short and long averages)
- Signal line: EMA 9 of MACD (smoothing)
- Histogram: MACD - Signal (shows positive or negative gap)
Classic signals:
- Bullish crossover: MACD crosses above signal line → buy signal
- Bearish crossover: MACD crosses below signal line → sell signal
- Zero-line crossing: MACD above 0 = confirmed bull market, below 0 = bear market
- Divergences: price makes new high but MACD doesn't → momentum fading
MACD strengths: excellent in clear trending markets, simple to read, infrequent signals (reduces noise). Weaknesses: lagging by nature (based on moving averages), poor in sideways markets where it generates many false signals.
Practical: MACD combines well with RSI (short-term timing) and support/resistance (entry zones). Many systematic traders use MACD as a trend filter before entering chart pattern setups.