FTB-C000011 / Data quality concept

Zero-Mover Session

A zero-mover session has no advancing or declining issues, so A plus D equals zero.

Also known asno-mover session

Intermediate 4 linked topicsPublished

Definitions

In plain terms

When nothing is classified as rising or falling, raw Net Advances can still equal zero, but a formula that divides by the number of movers cannot be calculated.

Technical

A validated session with A=D=0 has raw signed breadth A-D=0 while the canonical ratio-adjusted expression 1000(A-D)/(A+D) is undefined because its denominator is zero.

Scope

This state requires a real reconciled session; it must not be used as a substitute for missing data, an empty universe, or incomplete classification.

Examples

  • A session with 0 advances, 0 declines, and 25 valid unchanged issues is a zero-mover session.

Common misconceptions

  • An undefined ratio-adjusted value must not be silently converted to zero.

Concept relationships

Prerequisites

Contrasts with

Derived from

Where this concept is used

Tutorials planned

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

  • D04-F01-A02 Important
  • D04-F01-A04 Important
  • D04-F02-A02 Important
  • D04-F02-A04 Important

Evidence and governance

  1. Ratio Adjusted Summation Index McClellan Financial Publications · first party methodology

    Supports: short definition, technical definition, formula, variant distinction

    Limits: Historical interpretive thresholds are not universal trading rules; the source does not prescribe the package's evidence or software failure policies.

Reviewed by
Last reviewed
2026-07-26
Next review
2027-07-26
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.