Net Unrealized Profit/Loss is the difference between Relative Unrealized Profit and Relative Unrealized Loss. For more information see this article. This metric can also be calculated by subtracting realised cap from market cap, and dividing the result by the market cap as described in this article.
This is the Point-in-Time (PiT) variant of Net Unrealized Profit/Loss (NUPL). PiT metrics are strictly append-only and their history is immutable. The historic data does not necessarily reflect the best current knowledge, but the information at the time when a data point was first computed. PiT metrics are ideal candidates for applications in model backtesting and related quantitative purposes. Read our article on PiT metrics for more information.