Instantaneous Trend Line Bands for Filtering Trend Changes

Summary

The document describes an extension of John Ehlers' Instantaneous Trend Line (ITL), an indicator designed to remove the dominant cycle from a smoothing average. Its explanation relates the method to averaging over a full dominant-cycle period: values above and below the midpoint can offset, suppressing that cycle in the resulting line. A frequency-domain analogy describes the rectangular averaging window as having a first null aligned with the dominant cycle.

The bands are added to make trend changes easier to identify and to reduce false signals that may arise from using only the ITL slope. The text does not specify how the bands are calculated, how dominant-cycle length is estimated, or what thresholds trigger a signal. It supplies no chart, parameter guidance, or performance evidence, so the description gives the indicator's intuition but is insufficient to reproduce or assess a trading rule.

Key ideas

• The ITL aims to suppress the dominant cycle in a smoothing average.
• Averaging across a full dominant-cycle period is presented as the intuitive basis for cycle cancellation.
• The band extension is intended to clarify trend changes and filter some slope-only false signals.
• The document omits band formulas, signal thresholds, and evidence of trading performance.

Tags

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