Elder's Force Index Function (with source)

TradingView has built in functions for RSI, Momentum, and many other oscillators. Why the source isn't available for Elder's Force Index is beyond me. To me it's one of the Holy Grail indicators. This is EFI indicator with a simple function inside the source code. You're can easily copy this function into any study(indicator) or strategy that uses built-in oscillators, as a replacement.

Example using EFI instead of RSI in built-in Divergence Indicator:
gyazo.com/afe9f7e779...1564300912cd0ed54e01




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