HARSI - HeikinAshi RSI (with Bollinger Bands)

This is my first published script. I hope it might be useful!

This is a modified RSI that attempts to give smoother values. It takes 4 different input lengths and plots them in a similar way as Heikin-Ashi candles does.
It can be used in the same way as a regular RSI.
It also includes Bollinger Bands that might help identify overbought/oversold situations.

The script uses a slightly modified Allanster's 'Heikin Ashi source function' (many thanks for that very useful script!).