This script is based on the VWAP for the 50 (blue), 100 (red) and 200 (yellow) period currently.
It takes the VWAP, and normalises the different between stdev above and below, on an oscillator between 0-1.
It is a non-directional indicator, it's use-case is to assess when a "true" market move with power behind it is happening, or to find cylic patterns of price action.