Histogram vs Signal Line

The histogram in MACD is a bar chart displayed below the price chart that visualizes the distance between the MACD line and signal line, showing whether momentum is accelerating or decelerating in the current trend direction.

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.