The Moving Average Convergence Divergence, also called the MACD, is a trend-following momentum indicator used widely by traders. Although the MACD is a lagging indicator, it can be very useful in identifying possible trend changes. {chart} The MACD oscillates above and below a zero line, also known as the centerline. The shorter moving average is subtracted from a longer moving average to arrive at the value of the MACD. A signal line, which is the exponential moving average of the MACD completes the indicator. The blue line is the MACD and the red line is the signal line. When the blue line crosses above the red ... (full story)