This is part 3 of 11 in the system named Ninetales/Volt V2 you can find on Tradingview.
It simply measures all of the combinations of the defined parameters for Bollinger Bands, and returns the most logically accurate values.
Use it however you would use standard Bollinger Bands, just add your preferred values to test against each other, and set the period you would like for it to backtest.