$BIRB 4-hour MACD crosses bearishly above the zero line, with the opposing histogram bars persisting for 20 bars before the crossover.
Let’s break this number down.
The length of the bars represents the distance between DIF and DEA. Bars growing longer one by one indicate that momentum in the current direction is increasing; shortening bars mean it is fading.
A bearish crossover above the zero line is often interpreted as weakening upward momentum, but it doesn’t necessarily mean the trend is over. A bearish crossover below the zero line is more often seen as a continuation of weakness.
The same reading can mean completely different things in different market conditions, so don’t apply a rule of thumb mechanically.