Definitions
In plain terms
In a long state it is the highest eligible high; in a short state it is the lowest eligible low.
Technical
The state machine freezes initialization, strict new-extreme comparison, bar finality, ties, adjustment basis, and reversal reset.
Scope
It is state-dependent and not simply a fixed rolling high or low.
Examples
- A governed lesson calculates or identifies Parabolic SAR Extreme Point only after its parameters, state, timing, and edge cases are declared.
Common misconceptions
- It is state-dependent and not simply a fixed rolling high or low.
Concept relationships
Prerequisites
Where this concept is used
Evidence and governance
- TA-Lib Parabolic SAR Implementation TA-Lib · first party technical publication
Supports: preferred label, short definition, technical definition
Limits: Initial direction and extended-SAR options differ across implementations and must be declared.
- New Concepts in Technical Trading Systems J. Welles Wilder Jr. · first party methodology
Supports: historical attribution
Limits: The bibliographic page alone is not an executable specification; equality, seeds, and state transitions require pinned rules.
- Reviewed by
- fintech-builder-batch-007
- Last reviewed
- 2026-07-27
- Next review
- 2027-07-27
- Record status
- evidence reviewed
This record is evidence-reviewed and readable, but not yet promoted to published — it is served noindex,follow and excluded from the sitemap.