The MACD (Moving Average Convergence Divergence) is a popular indicator that shows both the direction of a trend and the strength of its momentum. It appears in a panel below the chart and works the same way on stocks, crypto, forex and commodities. This guide explains its parts, its standard settings and how traders read it.
The three parts of MACD
- MACD line: the difference between a fast EMA and a slow EMA (by default the 12 and 26 EMA).
- Signal line: a 9-period EMA of the MACD line.
- Histogram: the gap between the MACD line and the signal line, shown as bars.
The standard settings are 12, 26, 9. Most traders keep these; changing them makes the indicator faster or slower, with the usual trade-off between earlier signals and more false ones.
How to read MACD
1. Above or below zero
When the MACD line is above zero, the fast EMA is above the slow EMA, which suggests upward momentum. Below zero suggests downward momentum.
2. Signal line crossovers
A cross of the MACD line above the signal line is a bullish signal; a cross below is bearish. Crossovers in the direction of the main trend are usually more reliable than those against it.
3. The histogram
Growing bars show momentum increasing; shrinking bars show it fading. Shrinking bars can warn that a move is losing strength before a crossover happens.
4. Divergence
Bearish divergence: price makes a higher high while MACD makes a lower high. Bullish divergence: price makes a lower low while MACD makes a higher low. Divergence warns that the trend may be weakening, but it needs confirmation from price, such as a break of a trendline or a reversal chart pattern.
MACD vs RSI
Both measure momentum. RSI moves between 0 and 100 and is often used to spot overbought and oversold conditions. MACD has no fixed range and is better at showing trend direction and changes in momentum. Many traders use one of them, not both, to avoid repeating the same information.
Common mistakes
- Taking every crossover in a sideways market
- Using MACD alone, without looking at price, support and resistance or volume
- Forgetting that MACD is built from moving averages, so it lags behind price
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This article is for education only and is not investment advice. Trading involves risk, including the loss of capital.