FTB-C000320 / Indicator

Double Exponential Moving Average

Double Exponential Moving Average combines a first EMA and an EMA of that EMA to reduce lag relative to the first EMA.

Also known asDEMA

Advanced Formula defined 1 linked topicEvidence-reviewed

Definitions

In plain terms

Its formula is 2E1 minus E2, so it is a signed combination rather than a simple average.

Technical

The implementation freezes shared period and alpha, both seeds, nested readiness, missing data, numerical precision, and output start.

Scope

DEMA is not double exponential smoothing and can overshoot the input range.

Formula

DEMA = 2*E1 - E2
LaTeX: DEMA_t=2E_{1,t}-E_{2,t}
SymbolMeaningUnit
E1EMA of the inputinput unit
E2EMA of E1input unit

Output unit: input unit

Examples

  • A governed lesson uses Double Exponential Moving Average only with declared inputs, timing, parameters, and edge-case behavior.

Common misconceptions

  • DEMA is not double exponential smoothing and can overshoot the input range.

Concept relationships

Prerequisites

Related

Where this concept is used

Evidence and governance

  1. Double Exponential Moving Average TA-Lib · first party technical publication

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

    Limits: Provider lookback and unstable-period behavior must be distinguished from another implementation's warm-up policy.

Reviewed by
fintech-builder-batch-006
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.