MACD — Moving Average Convergence Divergence

What is MACD?

The MACD (Moving Average Convergence Divergence) was developed by Gerald Appel in the late 1970s. It shows the relationship between two EMAs of price — a fast one and a slow one — and generates trend direction, momentum, and reversal signals.

Components

• MACD Line: Fast EMA (12) minus Slow EMA (26)
• Signal Line: 9-period EMA of the MACD line
• Histogram: MACD Line minus Signal Line (visualizes divergence between the two)

Formula

MACD Line   = EMA(12) – EMA(26)
Signal Line = EMA(9) of MACD Line
Histogram   = MACD Line – Signal Line

Parameters

Signal Interpretation

• Bullish crossover → MACD line crosses above Signal line → buy signal
• Bearish crossover → MACD line crosses below Signal line → sell signal
• Zero-line cross → MACD crosses above 0 = bullish; below 0 = bearish
• Histogram expansion → Momentum accelerating in the current direction
• Histogram contraction → Momentum fading; possible reversal ahead
• Divergence → Price makes new high but MACD histogram falls → bearish divergence

Trading Strategies

• Classic crossover: Enter long when MACD crosses Signal from below; exit when it crosses from above.
• Zero-line rejection: MACD pulls back to the zero line and bounces — high-probability continuation trade.
• Histogram divergence: One of the most reliable reversal signals in technical analysis.

Tips & Best Practices

• MACD is a lagging indicator — it reacts to price, not predicts it. Use with price action for confirmation.
• Best on daily and weekly charts for swing trading.
• Intraday scalpers often use faster settings (5,13,5) or (3,10,16).
• Avoid trading crossovers in choppy, sideways markets — generates many false signals.