A Bollinger Band Breakdown Oscillator with Downtrend Sensitivity

Summary

The document outlines an oscillator built around the lower Bollinger Band. Its motivating observation is that an extended period of price remaining below that band may be associated with a greater chance of further declines. The calculation first measures the applied price relative to the lower band, adds a term based on the change in a simple moving average, and smooths the resulting difference with an exponential moving average. A slope factor increases the negative contribution when the average is falling more sharply.

Inputs include the smoothing period, Bollinger calculation period and deviation, slope factor, applied price, and an upper reference level; the lower reference is zero. The text supplies the calculation structure but no chart evidence, market specification, backtest, or assessment of predictive accuracy. It therefore describes an indicator hypothesis and its configurable mechanics, not a validated trading rule. The relationship between time below the band and subsequent price declines would need independent testing across assets and market conditions.

Key ideas

• The oscillator is motivated by the hypothesis that prolonged price action below the lower Bollinger Band signals downside risk.
• It compares applied price with the lower band and smooths the adjusted difference using an exponential average.
• A moving-average slope term makes the oscillator more negative during stronger declines.
• The document specifies inputs and calculation logic but provides no empirical validation.

Tags

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