FTB-C000390 / Formula component

Parabolic SAR Acceleration Factor

Parabolic SAR Acceleration Factor is the bounded coefficient controlling how quickly Parabolic SAR approaches its extreme point.

Also known asPSAR AFAF

Intermediate 1 linked topicPublished

Definitions

In plain terms

It begins at a declared initial value, increases on strict new extremes, and cannot exceed its maximum cap.

Technical

The contract stores initial AF, increment, cap, update order, tie rule, precision, and reversal reset.

Scope

A larger factor increases responsiveness but does not imply greater accuracy.

Examples

  • A governed lesson calculates or identifies Parabolic SAR Acceleration Factor only after its parameters, state, timing, and edge cases are declared.

Common misconceptions

  • A larger factor increases responsiveness but does not imply greater accuracy.

Concept relationships

Related

Required by

Where this concept is used

Tutorials planned

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

  • D07-F02-A07 Important

Evidence and governance

  1. 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.

  2. 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
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.