MACD (Moving Average Convergence Divergence)
MACD is one of the most versatile and widely used indicators in trading. It reveals changes in trend strength, direction, momentum, and duration. Despite being created in the 1970s by Gerald Appel, it remains a staple in modern traders' toolkits.
MACD Components
MACD consists of three elements:
- MACD Line — The difference between the 12-period EMA and 26-period EMA
- Signal Line — A 9-period EMA of the MACD Line (acts as a trigger)
- Histogram — The visual difference between the MACD Line and Signal Line (shows momentum)
Reading MACD Signals
Key signals:
- MACD crosses above Signal Line → Bullish (buy signal)
- MACD crosses below Signal Line → Bearish (sell signal)
- MACD crosses above zero line → Trend turning bullish
- MACD crosses below zero line → Trend turning bearish
- Growing histogram bars → Increasing momentum
- Shrinking histogram bars → Weakening momentum
MACD Divergence
Like RSI, MACD divergence is a powerful signal. When price makes new highs but MACD makes lower highs, it suggests the uptrend is losing steam. When price makes new lows but MACD makes higher lows, a potential bottom may be forming.
Pro Tip
The MACD histogram is incredibly useful for spotting momentum shifts early. When the histogram starts shrinking (even though it's still positive), it means bullish momentum is slowing — a potential warning sign before a MACD crossover occurs.
Key Takeaways
- MACD consists of the MACD line, signal line, and histogram
- Crossovers of MACD and signal line generate buy/sell signals
- Zero line crossovers confirm trend changes
- The histogram visually shows momentum strength
- MACD divergence warns of potential trend reversals