FTB-C000010 / Formula component

Breadth Scale Factor

The breadth scale factor multiplies a normalized issue-balance ratio into a declared reporting scale.

Also known asnormalization multiplier

Definitions

In plain terms

Multiplying by 1,000 expresses the fraction of net advancing issues as points per 1,000 moving issues without changing which side is stronger.

Technical

In the canonical ratio-adjusted McClellan transform, k equals 1,000 in r = k(A-D)/(A+D), so k controls output magnitude but not sign or scale-invariance to proportional count changes.

Scope

The value 1,000 belongs to this canonical methodology; changing it changes reported units and must not be presented as the same series.

Examples

  • A mover-balance ratio of 0.2 becomes 200 breadth points when the scale factor is 1,000.

Common misconceptions

  • The scale factor does not represent the actual number of securities in the universe.

Concept relationships

Where this concept is used

Evidence and governance

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

    Supports: preferred label, short definition, technical definition, formula, units

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

Reviewed by
fintech-builder-owner-approved
Last reviewed
2026-07-26
Next review
2027-07-26
Record status
published