In trading, to forward-test means freezing a strategy version and observing its behaviour on data that arrive after that decision. The rules are not rewritten after their outcomes have been seen.
How the term is used
A forward test may run in simulation, shadow mode, or with tightly limited real capital. It should identify the version, start date, environment, costs, metrics, and any change made during the test.
Technical distinction
Forward testing and paper trading are not synonyms. The former describes the temporal order between the freeze and new data; the latter describes an environment without normal economic exposure. Even a favourable prospective period observes only the regimes encountered and does not guarantee future performance or capacity at a larger scale.
Sources
- Leonard J. Tashman, Out-of-sample tests of forecasting accuracy: an analysis and review, 2000 — Temporal order and successive out-of-sample evaluations.
- CFA Institute Research Foundation, Investment Model Validation: A Guide for Practitioners, 2024 — Prospective validation, reliability, and limitations of investment models.