The difference in volume flowing into exchanges and out of exchanges, i.e. the net flow of coins into/out of exchanges. Note that exchange metrics are based on our labeled data of exchange addresses that we constantly keep updating, as well as data science techniques and statistical information that changes over time. Therefore these metrics are mutable – the data is stable, but especially most recent data points are subject to slight fluctuations as time progresses.
This is the Point-in-Time (PiT) variant of Exchange Netflow Volume. 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.