FTB-C000477 / Financial concept

Zero-Range ATR State

Zero-Range ATR State occurs when a ready ATR legitimately equals zero because all contributing range innovations are zero.

Also known aszero ATR state

Intermediate 1 linked topicPublished

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

Prerequisites

Related

Where this concept is used

Tutorials planned

These catalogued topics use this concept, but their complete build has not shipped yet.

  • D07-F04-A02 Important

Evidence and governance

  1. 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.

  2. 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
Written by

Fintech engineer building market-data and financial systems, and the author of every article, glossary record, and reference implementation on The Fintech Builder.