FTB-C000346 / Formula component

Slow EMA Period

Slow EMA Period is the declared period or alpha parameter for MACD's more persistent EMA.

Also known asMACD slow span

Foundation 2 linked topicsPublished

Definitions

In plain terms

It normally uses more observations than the fast period and supplies the denominator-like baseline in the MACD spread.

Technical

The configuration must validate a positive period, alpha convention, seed, and its strict ordering relative to the fast period.

Scope

Slow is a relative role and is not the same as the signal-line period.

Examples

  • A governed lesson calculates or identifies Slow EMA Period only after its parameters, state, timing, and edge cases are declared.

Common misconceptions

  • Slow is a relative role and is not the same as the signal-line period.

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-F02-A01 Prerequisite
  • D07-F02-A02 Prerequisite

Evidence and governance

  1. TA-Lib MACD Implementation TA-Lib · first party technical publication

    Supports: preferred label, short definition, technical definition

    Limits: Provider-specific compatibility behavior and unstable periods must be reconciled before claiming parity.

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.