The indicator is used to gauge the short term volatility of the instrument relative to its long term volatility.
The green columns of histogram represent lower short term volatility relative to long term, whereas Red columns of histogram represent Higher short term volatility relative to long term.
Higher the bar higher the strength of the signal.
This indicator is inspired by Matt Caruso's(Canslim Champion investor) chat on Richard Moglen's(Champion trading youtuber) podcast.