Bollinger Bands Using EMA Deviation Instead of Standard Deviation

Summary

This note describes a variation on Bollinger Bands. In the conventional formulation summarized here, an N-period moving average anchors the bands, while a multiple of the period’s standard deviation sets the distance of the upper and lower bands from that average. The described variant replaces that standard-deviation measure with EMA deviation when constructing the bands.

The stated motivation is a faster response to changes in market volatility. The document gives no precise definition of EMA deviation, parameter guidance, example, backtest, or comparison of results, so it does not establish how much faster the response is or whether the change improves trading decisions. It explains a change in band construction, but offers no entry, exit, or risk-management rules. Users would need implementation details and independent testing before treating the variation as a trading signal.

Key ideas

• The described bands are anchored by a moving average.
• The conventional formulation places bands using a multiple of standard deviation around the average.
• This variation uses EMA deviation in place of standard deviation for the bands.
• The document says the substitution makes the bands respond faster to volatility changes.
• No trading rules, parameter guidance, or performance evidence are provided.

Tags

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