What does MACD mean?

MACD (Moving Average Convergence Divergence) measures the difference between two exponential moving averages to gauge a stock's momentum.

MACD = 12-EMA minus 26-EMA, plotted with a 9-EMA 'signal line'. When MACD crosses above the signal line, momentum is shifting bullish. When it crosses below, momentum is turning bearish. The histogram shows the gap between them.