Definitions
In plain terms
The rule keeps the percent interpretation meaningful and prevents division by zero.
Technical
The D07 contract returns unavailable for a zero or negative middle even if the upper and lower bands themselves are numerically defined.
Scope
Other domains may adopt a different denominator policy, but it must be named rather than silently assumed.
Examples
- A reviewer traces BandWidth Positive-Middle Requirement from aligned inputs through its first-ready row and edge cases before accepting a displayed value.
Common misconceptions
- Other domains may adopt a different denominator policy, but it must be named rather than silently assumed.
Concept relationships
Prerequisites
Related
Where this concept is used
Evidence and governance
- Bollinger BandWidth TradingView · official platform documentation
Supports: preferred label, short definition, technical definition
Limits: No universal squeeze threshold, breakout direction, causal forecast, or profitability claim is adopted.
- Reviewed by
- fintech-builder-batch-009
- Last reviewed
- 2026-07-30
- Next review
- 2027-07-30
- Record status
- published