Relative Strength to Levy as a Price Momentum Measure

Summary

The document presents Relative Strength to Levy as a way to compare a security’s past performance with its most recent observation period. Its premise is that securities with strong relative performance in the past may continue to perform relatively strongly, while past weakness may persist. It describes calculating an arithmetic mean of closing prices over an observation period and plotting the result around a reference level of 1.0.

The text treats readings above 1 as indicating stronger past performance, though its wording is unclear about the exact comparison and likelihood implied. It also mentions a separate variant that divides standard deviations of recent weekly closes to assess volatility, but does not explain the full formula or how to interpret the output. No backtest or evidence of predictive power is provided, so the persistence assumption should be treated as a hypothesis rather than a demonstrated trading result.

Key ideas

• The Levy relative-strength concept assumes past relative performance may persist.
• The described measure uses an arithmetic mean of closing prices over an observation period.
• Its output is centered around a reference value of 1.0.
• The document associates readings above 1 with stronger past performance, but leaves the comparison somewhat unclear.
• A separate variant uses dispersion in recent weekly closes to assess volatility, without fully specifying the method.

Tags

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