Level: 2
Background
John F. Ehlers introuced Zero Mean Roofing Filter in his "Cycle Analytics for Traders" chapter 7 on 2013.
Function
The HP-LP Roofing Filter output still contains all of these frequency components. The only way we can reduce the effect of these lower-frequency components is to introduce another high-pass filter, adding an additional 6 dB...
![XBTUSD.P: [blackcat] L2 Ehlers Zero Mean Roofing Filter](https://s3.tradingview.com/y/Yh29jSbP_mid.png "[blackcat] L2 Ehlers Zero Mean Roofing Filter")
