Navigation: Realtest Script Language > Syntax Element Details > EhlersSS Category Multi-Bar Functions Description Two-pole SuperSmoother filter as described by John Ehlers. Syntax EhlersSS(expr, count) Parameters expr - data series formula count - lookback period Notes A low-lag smoothing filter that attenuates frequencies above the cutoff period with less lag than a comparable moving average. Provides a smoother result than SMA or EMA with sharper frequency rejection. This function supports one-pass calculation when used in the Data Section. Example EhlersSS(Close, 10) Smooths the closing price with less lag than a comparable EMA. Useful as a low-lag trend filter or signal line. Copyright © 2020-2026 Systematic Solutions, LLC