MACD histogramhttps://www.dailyfx.com/forex/education/trading_tips/chart_of_the_day/2014/05/15/A-Quicker-Trade-Signal-Using-MACD-Histogram.html
The link above should help you understand some TA; since a lot here don't. Please, look up more resources as well.
The chart link below shows how the MACD histogram is near a crossover to the positive:
https://schrts.co/9fCTpw
Notice that on MGW's own chart, the positive histogram areas line up with run-ups
It's coming