Technical Analysis · Momentum Indicators
MACD: Comparing Two Moving Averages
What You'll Learn
- What MACD is built from
- The three components typically shown on a MACD indicator
- How it's generally used alongside trend tools from earlier in this course
The Big Idea
Let me teach you MACD, short for Moving Average Convergence Divergence. It measures the relationship between two moving averages of different lengths, turning the crossover concept from earlier in this module into its own dedicated, standalone momentum indicator.
Let's Break It Down
At its core, MACD is calculated as the difference between a shorter moving average and a longer one. When the shorter average is above the longer one, MACD is positive. When it is below, MACD is negative. This is plotted as its own line, called the MACD line.
A second line, called the signal line, is itself a moving average of the MACD line — smoothing it out further, using the same smoothing concept from earlier in this module. Many platforms also display a histogram, showing the gap between the MACD line and the signal line as a set of bars, making that relationship easier to see at a glance.
MACD is typically read for two things: crossovers between the MACD line and its signal line, similar in concept to the moving-average crossover you learned earlier, and the overall direction of the MACD line relative to zero, which reflects the broader relationship between the two underlying moving averages.
Real Example
If the moving-average crossover from earlier in this module is like watching two runners occasionally overtake each other, MACD is like plotting the exact gap between them continuously. It is not just noting the moments they cross, but tracking how that gap grows and shrinks the whole time — which reveals more detail about the relationship between them.
Why It Matters
MACD packages the crossover concept from earlier in this module into a dedicated, more detailed tool. It is one of the most commonly used indicators specifically because it combines both a trend-relationship signal and a momentum signal in one place.
Common Mistake
Please do not treat MACD as something entirely unrelated to moving averages. It is built directly from two moving averages. Understanding that connection makes it much easier to interpret than memorizing it as an unrelated, standalone tool.
Quick Check
What is MACD fundamentally built from?
Key Takeaways
- MACD measures the relationship between a shorter and a longer moving average.
- It's typically shown with a MACD line, a signal line, and a histogram representing the gap between them.
- It's read for both crossovers between its two lines and its overall direction relative to zero.
Finished reading?
Mark this lesson as complete to track your progress.