MACD (Moving Average Convergence Divergence)
In simple terms
MACD is a tool that helps traders spot whether a cryptocurrency's price is trending up or down. Think of it like a traffic light that signals when momentum is building or slowing down.
Definition
Trend-following momentum indicator showing the relationship between two moving averages.
In depth
MACD is a momentum oscillator that calculates the difference between a 12-period exponential moving average (EMA) and a 26-period EMA, plotted against a 9-period signal line (which is an EMA of the MACD itself). When the MACD line crosses above the signal line, it generates a bullish signal indicating upward momentum; crossings below signal bearish momentum. The histogram visualizes the divergence between these lines, helping traders identify trend strength and potential reversal points.
How does MACD (Moving Average Convergence Divergence) work?
MACD is built from three moving averages. First, a 12-period exponential moving average and a 26-period EMA are calculated on closing prices; subtracting the slower from the faster gives the MACD line, which is positive when short-term prices sit above longer-term ones. Second, a 9-period EMA of that MACD line becomes the signal line. Third, the histogram plots MACD minus signal, so the bars shrink as the two lines converge and flip sign when they cross. Because every input is an average of past prices, MACD always lags.
An example
Suppose an illustrative asset's 12-day EMA is $52.00 and its 26-day EMA is $50.00. The MACD line reads +2.00. Its 9-day EMA, the signal line, is 1.60, so the histogram is +0.40. A week later the gap narrows: the 12-day EMA is $51.40 against a 26-day EMA of $50.20, putting MACD at 1.20 while the signal line has only fallen to 1.52. The histogram is now -0.32 — a crossover, describing momentum that has already faded.
Figures are illustrative only.
What beginners get wrong
- Reading every crossover as an instruction leads to repeated whipsaws, because sideways markets generate crossings that reverse within a period or two.
- MACD values are expressed in the asset's price units, so a reading of 2.00 on one coin is not comparable to 2.00 on another.
- A shrinking histogram means the two lines are converging, which is not the same as price being about to reverse.
- Default 12/26/9 settings came from daily stock sessions; crypto trades continuously, so the same settings behave differently across chart intervals.
Related terms
Part of
What is technical analysis, and how are crypto charts read? — the subject page for technical analysis, with all 29 of its definitions in one place.
Educational only — not financial advice.