Superseded (2026-05-25) — this operator is a Layer-1 transform, not a Layer-0 atomic input. Merged into compute_sma_v1. Kept for history.

What (One-liner)

Thin wrapper for pandas rolling mean, basic primitive for technical indicators.

How to use

from services.algo.technical import compute_sma
compute_sma(prices, period=20)

Core formulas

sma_t = prices.rolling(window=period).mean()[t]

Assumptions & applicability

Assumptions: Equidistant timestamps + pd.Series/list input + window≥2.

Applicability: Price smoothing, MACD components, GC/DC strategies.

Out of scope: weighted MA (EMA), adaptive window.

Known limitations

1. Left-aligned (NaN prefix)
2. period default 20
3. Does not handle calendar gap

References

Murphy (1999) Technical Analysis.

Golden Test

tests/golden/fixtures/tier1/compute_sma/, 1e-12, 2026-04-20 passing.

Changelog

• 1.0.0 (2026-04-20) — Initial Active