Definitions
In plain terms
The boundary then steps to the next eligible maximum or minimum unless a new equal or more extreme value has entered.
Technical
Its timing follows finite n-row memory, current-row inclusion, and tied-owner handling rather than recursive decay.
Scope
Expiry is abrupt and contrasts with the geometric fading of EMA or ATR state.
Examples
- A reviewer traces Rolling-Extreme Expiry from aligned inputs through its first-ready row and edge cases before accepting a displayed value.
Common misconceptions
- Expiry is abrupt and contrasts with the geometric fading of EMA or ATR state.
Concept relationships
Prerequisites
Contrasts with
Where this concept is used
Evidence and governance
- Donchian Channels TradingView · official platform documentation
Supports: preferred label, short definition, technical definition
Limits: Causal lagging, tie ownership, and exact breakout event rules are local implementation boundaries.
- Reviewed by
- fintech-builder-batch-009
- Last reviewed
- 2026-07-30
- Next review
- 2027-07-30
- Record status
- published