NVO (NVST) currently down on CMC, use xchain.io exchange

https://xchain.io/market/XCP/NVST

This will take you directly to the real time price of NVO, it appears something changed with CMC api for live pricing of nvo and makes it appear to show question marks for its current price on CMC.

You can also check out nvocommunity.com for live pricing and current buy/sell orders without a login here:

https://www.nvocommunity.com/chart.html