Hodrick–Prescott Channels for Short-Term Price Direction

Summary

The indicator creates a channel by filtering closing prices with the Hodrick–Prescott method at two periods, then measuring the standard deviation of the faster filtered series relative to the slower one. It also displays the average spread and the channel width as a percentage of the slower series. The author presents it as a tool for judging very short-term price direction, especially for scalping, rather than for long-term trend analysis.

The document explains that the filter can look smoother and more responsive than a moving average, but that this appearance comes with a limitation: its values can change as new bars arrive. It describes bidirectional filtering as one way to reduce lag, while emphasizing that smoothing and delay cannot both be eliminated. The author illustrates changing historical channel behavior by observing its moving tail on a one-minute chart. No quantified trading results or performance comparison are supplied, so the indicator’s usefulness as a signal would require independent testing.

Key ideas

• The channel compares fast and slow Hodrick–Prescott filtered closing prices.
• Its width is based on the standard deviation of the fast series relative to the slow series.
• The indicator is presented for short-term direction and scalping.
• Filtered values can change as new bars arrive, reducing confidence in historical readings.
• The document supplies no quantified evidence that the indicator is profitable.

Tags

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