The Fee Ratio Multiple (FRM) is defined as the ratio between the total miner revenue (blocks rewards + transaction fees) and transaction fees. FRM is a measure of a blockchain's security and gives an assessment how secure a chain is once block rewards disappear. This metric was first introduced by Matteo Leibowitz. For more information please see his article.

This is the Point-in-Time (PiT) variant of Fee Ratio Multiple (FRM). 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.