Bollinger Bands is a specific Trading coordinate in the Bitcoin knowledge graph. In practical terms, it identifies the subject described here: A moving average surrounded by volatility bands based on standard deviation. This definition is narrower than promotional usage and should be read together with the implementation, date and evidence attached to the entry.
Bollinger Bands is best understood as part of a system rather than as an isolated definition. Its related coordinates show the mechanisms, incentives and historical records that give the term practical meaning.
Bollinger Bands describes how participants value, trade or obtain exposure to bitcoin. Market behavior can affect adoption and mining economics, but it does not rewrite consensus rules. Price evidence and protocol evidence answer different questions.
Understanding Bollinger Bands helps distinguish a verifiable Bitcoin mechanism or historical record from slogans, products and market narratives.
Primary or authoritative records make these details checkable: Bollinger Bands place upper and lower envelopes around a moving average using a chosen multiple of rolling standard deviation; results depend on price field, lookback, variance convention and market session. They should be verified before using the coordinate in analysis.
The practical limit is: touching a band is not automatically overbought, oversold or a reversal; standard deviation does not imply normally distributed returns; parameters selected after viewing history overfit. A definition, office, chart pattern or published claim is not by itself a prediction or Bitcoin consensus rule.
For the clearest picture, read this entry together with Moving average, Volatility, Bollinger squeeze, Technical analysis, Bitcoin. The reverse links also lead from Bollinger squeeze, Mean reversion.