Gamma Bands are based on previous day data of base intrument, Volatility , Options flow (imported from external source Quandl via TradingView API as TV is not supporting Options as instruments) and few other additional factors to calculate intraday levels. Those levels in correlation with even pure Price Action works like a charm what is confirmed by big orders often placed exactly on those levels on Futures Contracts. We have levels +/- 0.25, 0.5 and 1.0 that are calculated from Pivot Point and are working like Support and Resistance. Higher the number of Gamma, stronger the level. Passing Gamma +1/-1 would be good entry point for trades as almost everytime it is equal to Trend Day. Levels are calculated by Machine Learning algorithm written in Python which downloads data from Options and Darkpool markets, process and calculate levels, export to Quandl and then in PineScript I import the data to indicator. Levels are refreshed each day and are valid for particular trading day.
There's possibility also to enable display of Initial Balance range (High and Low range of bars/candles from 1st hour of regular cash session). Breaking one of extremes of Initial Balance is very often driving sentiment for rest of the session.
Volatility Reversal Levels They're calculated taking into account Options flow imported to TV (Strikes, Call/Put types & Expiration dates) in combination with Volatility, Volume flow. Based on that we calculate on daily basis Significant Close level and "Stop and Reversal level". Very often reaching area close to those levels either trigger immediate reversal of previous trend or at least push price into consolidation range.