I use Ninja Trader, where can i get something like this that will work with NT?
Or is this something that i need Sierra or ?

Im looking for COB and these specific key levels.

COB (current order book) right of the candles
Special Key Level Indicators

YVH Yesterday value high
POC Point of Control
YVL yesterday value low
Yesterday close
IBH Initial Bal Hi
IBL Initial Bal Low
ONH
ONL

Any modern platform will provide this for you, such as Edge Pro, NinjaTrader, Sierra, Bookmap, TradingView. Whatever.

As for finding it in a specific platform (such as NT8), I suggest either go to an NT8-specific forum (here or elsewhere) or contact customer support of that platform.

And yes, I'm sorry I'm not really answering your question but I hope it helps. I guess my point is, what you're asking for is a very basic feature for all modern platforms.