MACD: Two Moving Averages Arguing With Each Other

MACD (Moving Average Convergence Divergence) is the difference between a 12-period EMA and a 26-period EMA, plotted as a line. A 9-period EMA of that line is plotted alongside it as the 'signal line.' When the MACD line crosses the signal line, momentum is accelerating or decelerating relative to its own recent pace.

Reading the crosses

A bullish cross (MACD over signal) means the short-term average is gaining on the long-term average faster than it was — momentum is building. A bearish cross is the opposite. A zero-line cross is a stronger statement: it means the 12-EMA has actually overtaken the 26-EMA (or vice versa), not just that momentum is accelerating within an existing trend.

Signal cross vs. zero cross

• MACD Bullish/Bearish Cross — the faster, noisier signal. Fires more often, including inside choppy ranges.
• MACD Zero Cross Bull/Bear — the slower, more committed signal. By the time this fires, the trend has usually already been building for a while.

The honest limitation

Because MACD is built entirely from moving averages, it inherits their core weakness: it's a lagging indicator dressed up as a leading one. In a sideways market, the MACD line and signal line whipsaw back and forth across each other, throwing off crosses that mean nothing. That's why ChartWyz shows occurrence count next to every MACD setup — a handful of clean crosses in a strong trend tells you something; a dozen crosses in three days tells you the market is directionless.