The MACD histogram is the set of bars that shows the gap between the MACD line and its signal line. Tall bars mean momentum is strong; shrinking bars mean momentum is slowing.
The calculation is simple: histogram equals MACD line minus signal line. When the MACD line is above the signal line, the bars sit above zero. When it drops below, the bars flip under zero. The moment the bars cross zero is the same moment as a MACD crossover.
Many traders find the histogram more useful than the crossover because it changes earlier. Say a hypothetical stock is rising from ₹200 to ₹240. The bars grow for several days, then start getting shorter while the price still creeps up to ₹245. Momentum is fading before the lines even cross. That is not a sell signal by itself, but it is a cue to tighten your stop loss or avoid fresh buying.
Two practical tips:
- Read the trend of the bars, not one bar. A single short bar after a quiet holiday session means little.
- Compare histogram peaks with price peaks to spot divergence.
In sideways markets the bars flip above and below zero constantly, so the tool works best when a trend exists. We cover MACD, its histogram and when to ignore both in our technical analysis course.