Crossover vs Signal Line

A crossover occurs when one technical line passes through another on a chart — such as the MACD line crossing the signal line or two moving averages crossing — generating a buy or sell signal based on the direction of the cross.

The 9-period EMA of the MACD line, plotted alongside it to generate crossover signals — when the MACD line crosses above the signal line it is bullish; when it crosses below it is bearish.