Definitions
In plain terms
It becomes positive when the fast EMA is above the slow EMA and negative when it is below.
Technical
Both EMAs must share aligned inputs and timestamps, and the line begins only when both declared stages are ready.
Scope
A zero value means the two EMA values are equal; it does not guarantee a lasting trend change.
Formula
MACD line = Fast EMA - Slow EMAM_t=F_t-S_t| Symbol | Meaning | Unit |
|---|---|---|
F_t | fast EMA at t | input unit |
S_t | slow EMA at t | input unit |
Output unit: input unit
Examples
- A governed lesson calculates or identifies MACD Line only after its parameters, state, timing, and edge cases are declared.
Common misconceptions
- A zero value means the two EMA values are equal; it does not guarantee a lasting trend change.
Concept relationships
Required by
Where this concept is used
Evidence and governance
- TA-Lib MACD Implementation TA-Lib · first party technical publication
Supports: preferred label, short definition, technical definition, formula
Limits: Provider-specific compatibility behavior and unstable periods must be reconciled before claiming parity.
- TA-Lib MACD Implementation TA-Lib · first party technical publication
Supports: variant distinction
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
- evidence reviewed
This record is evidence-reviewed and readable, but not yet promoted to published — it is served noindex,follow and excluded from the sitemap.