TTP Volatility NVT (HV+ATR) v0.1

This indicator looks into Willy Woo's 2017 introduced NVT and volatility.
charts.woobull.com/bitcoin-nvt-ratio/

It can show volatility using historical volatility or average true range.

Instructions:
- add it to a daily BTCUSD chart
- Use HV (historic volatility) or ATR to visualise volatility
- whenever volatility is very low and colour comes back up in green it's signalling a pump
- whenever volatility is very low and colour comes back up in red it's signalling a pump

Future work:
- adding alerts
- adding support for backtesting

The strategy is based on the one introduced by Crypto Crew University in this video:
youtube.com/watch?v=BT1kpDWMUMQ&ab_channel=CryptoCrewUniversity

I couldn't find any open source version of the indicator so I had to reverse engineer it. It seems to be working exactly as the one presented in the video.