This is a 1 bar momentum using a regularized ema (Chris Satchwell, Pattern Recognition And Trading Decisions pag.192) with a limit lambda (John F. Ehlers Cybernetic Analysis for Stocks and Futures pag.188), some say that is better than macd.
Ehlers Super Smoother Filter script.
This indicator was originally developed by John F. Ehlers (see his book `Cybernetic Analysis for Stocks and Futures`, Chapter 13: `Super Smoothers`).
