What is MACD?

Picture two cars on the same route: one reacts quickly to changes in speed, the other more slowly. The distance between them shows whether the first is pulling away or the second is catching up. MACD tracks something similar in prices, comparing a fast and a slower moving average.

Its name stands for Moving Average Convergence Divergence. In the standard setting, the MACD line is calculated by subtracting the 26-period exponential moving average from the 12-period one. An exponential moving average gives more weight to recent prices. If you’re looking at a daily chart, the periods are days; on an hourly chart, they’re hours.

Alongside it is the signal line, a 9-period exponential moving average of the MACD line itself. The histogram bars show the difference between the two lines. When they grow above zero, MACD is pulling further above the signal line. When they shrink, the gap is narrowing.

Why it matters

MACD helps you read price momentum, meaning how strongly the price is moving in one direction. A crossover above the signal line is often read as a sign of strengthening bullish momentum. Above zero, the fast average is higher than the slow one; below zero, the opposite is true.

If, for example, Bitcoin makes a higher high in price but MACD makes a lower high, that’s a divergence. It may suggest the rally is losing momentum, not that a drop is necessarily coming.

What to watch out for

MACD is calculated from past prices, so it lags. In a market that chops back and forth without a clear trend, crossovers can give a string of misleading signals. Also, a positive signal on the hourly chart can coexist with a negative one on the daily.

We treat it as an aid for reading the chart, together with price action and trading volume. It doesn’t measure a project’s value, and no crossover guarantees the next move.