Modifed by @PolarSolar - fix histogramm offset to original and added different colors to more understanding Gator histogramm
The histogram above zero shows the absolute difference between blue and red lines of indicator,
while histogram below zero shows the absolute difference between red and green lines.
There are green and red bars on the histograms.
A green bar appears when its value is higher than the value of the previous bar.
A red bars appears when its value is lower than the value of the previous bar.
helps to better visualize the upcoming changes in the trends: to know when sleeps, eats, fills out and is about to go to sleep.