The midline is based off of an Event Anchored ("eVWAP"?) instead of a periodic or period based one because that just doesn't make sense to me for a 24/7 market.
The bands aren't regular stdevs, they're devs based off of something else besides the "eVWAP" and are mathed against another math.
A lot of different ways to play this indicator such as ping ponging between the first two bands and the midline, knife catching trend reversals with the outer bands, confluence for swing traders if price is at a resistant/support and is within one of the middle bands, etc
Useful for all timeframes in different ways.
I've butchered all those explanations but I hope you enjoy and use it anyways.