I am interested in seeing if there is a . PVT indicator for NT8. I do not know how to write the initial value of the PVT on which one would build each calculation

The closest thing I've seen available for NT8 is the OBV indicator. I also think the Volume Reversal Indictor Volume Reversal is interesting. It's not an oscillator, and a bit of a black box, but supposedly takes volume and price into account for its signals.

The only Price Volume Trend (PVT) indicator for NT8 that I know of is listed as the Modified Price-Volume Trend Indicator and is found on NinjaTrader EcoSystem at https://ninjatraderecosystem.com/user-app-share-download/modified-price-volume-trend-indicator/ I hope this helps you.