This width indicator shows the fanning width of each fan (shorter MAs and longer MAs).
To make things easier to see: You can turn off one of the histograms to view just one of the widths (and add a 2nd instance of this indicator, turning off the other width).
Notes de version
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NEW ADDITIONS:
Added a Width Between line, which shows the width between the two EMA fans: Basically, when the line is at 0, then the slowest EMA of the Slow Fan and the fastest EMA of the Fast Fan are crossing each other. (It is possible to hide this line, or any of the histograms, in the configuration window).
Added 6 (configurable) horizontal lines to help visualize things better.
Changes to defaults values:
Changed the line thickness of the Slow Fan's histogram to help differentiate between histograms in overlapping areas.