Definitions
In plain terms
A perfectly flat eligible history can produce zero after warm-up; zero is different from unavailable.
Technical
The state requires valid bars and a completed seed or recursive path whose True Range inputs are zero under the frozen contract.
Scope
Zero ATR does not authorize division by zero in normalized indicators or band formulas.
Examples
- A reviewer traces Zero-Range ATR State from aligned inputs through its first-ready row and edge cases before accepting a displayed value.
Common misconceptions
- Zero ATR does not authorize division by zero in normalized indicators or band formulas.
Concept relationships
Where this concept is used
Evidence and governance
- Average True Range TA-Lib · first party technical publication
Supports: preferred label, short definition, technical definition
Limits: Seed, smoothing convention, lookback, and missing-bar handling must be declared for reproducible use.
- TA-Lib Average True Range Reference Implementation TA-Lib · first party technical publication
Supports: preferred label, short definition, technical definition
Limits: TA-Lib readiness follows its own unavailable-first-TR convention and therefore differs from the local alignment.
- Reviewed by
- fintech-builder-batch-009
- Last reviewed
- 2026-07-30
- Next review
- 2027-07-30
- Record status
- published