Ehlers Reverse EMA for Low-Lag Trend and Cycle Analysis

Summary

This short description introduces John Ehlers’s reverse EMA indicator as a causal approach that combines forward and backward EMA processing for use in live trading. It says the method applies double smoothing at the high-frequency end to reduce aliased components, while mitigating spectral dilation at the low-frequency end. The indicator is presented as flexible: adjusting its alpha parameter lets it display either trend or cycle information, with low lag.

The document offers a conceptual description rather than implementation details, parameter guidance, charts, or empirical tests. It does not define how to choose alpha, quantify lag or alias reduction, or compare results with other indicators. Traders and researchers can take away the proposed signal-processing tradeoffs and the role of alpha, but would need the original technical treatment and independent testing to assess behavior across instruments and market conditions.

Key ideas

• The reverse EMA is described as combining causal forward and backward EMA processing.
• Double smoothing at the high-frequency end is intended to reduce aliasing.
• The indicator is said to mitigate spectral dilation at the low-frequency end.
• Changing alpha is presented as a way to emphasize trend or cycle information.
• The description claims low lag but provides no measurements or comparative evidence.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.