Bull Bitcoin Introduced Fee Multiple for Fee-efficient Transactions

"We created an indicator which shows clearly if the current Bitcoin Network fees are high or low relative to the average of the past year and the past month. It's similar to the Mayer Multiple, but for fees instead of price. This tool is also available via API, for apps that want to automate tasks or send notifications based on the network fee levels."

https://www.nobsbitcoin.com/bull-bitcoin-fee-multiple/