FTB-C000403 / Formula component

Positive Gain

Positive Gain is the positive part of a close-to-close change and is zero when the change is nonpositive.

Also known asRSI gain

Foundation Formula defined 1 linked topicPublished

Definitions

In plain terms

It isolates upward movement while preserving a nonnegative price-unit series for RSI smoothing.

Technical

The implementation freezes equality, input precision, missing changes, corporate-action basis, and chronological order.

Scope

A zero gain can coexist with a positive loss magnitude and is real data, not missing.

Formula

Gain_t = max(Change_t, 0)
LaTeX: G_t=\max(\Delta C_t,0)
SymbolMeaningUnit
Change_tclose-to-close changeprice

Output unit: price

Examples

  • A governed lesson calculates or identifies Positive Gain only after its inputs, window, state, scale, and edge cases are declared.

Common misconceptions

  • A zero gain can coexist with a positive loss magnitude and is real data, not missing.

Concept relationships

Prerequisites

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-F03-A01 Important

Evidence and governance

  1. Relative Strength Index TA-Lib · first party technical publication

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

    Limits: Seed, flat-series behavior, unstable periods, and platform compatibility must be frozen before claiming parity.

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.