FTB-C000459 / Implementation concept

Prior-Only Ranking Window

Prior-Only Ranking Window uses only observations available before the current value as the percent-rank reference sample.

Also known aslagged rank window

Intermediate 1 linked topicPublished

Definitions

In plain terms

For Connors RSI, today's return is compared with N prior returns and is not inserted into its own denominator.

Technical

The contract freezes window length, endpoints, valid-return counting, missing gaps, first-ready index, and knowledge cutoff.

Scope

Including the current value changes both denominator and rank semantics.

Examples

  • A governed lesson calculates or identifies Prior-Only Ranking Window only after its inputs, window, state, scale, and edge cases are declared.

Common misconceptions

  • Including the current value changes both denominator and rank semantics.

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-F03-A08 Important

Evidence and governance

  1. Connors Relative Strength Index Implementation QuantConnect Lean · first party technical publication

    Supports: preferred label, short definition, technical definition

    Limits: The moving branch can change; exact parity requires a pinned revision and an explicit tie and ranking-window contract.

Reviewed by
fintech-builder-batch-008
Last reviewed
2026-07-29
Next review
2027-07-29
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.