# Rolling Window Features

> Source: https://sukruyusufkaya.com/en/glossary/rolling-window-features
> Updated: 2026-05-13T20:00:43.339Z
> Type: glossary
> Category: veri-bilimi-ve-veri-yonetimi
**TLDR:** A feature structure that summarizes past observations within a defined window to generate time-dependent signals.

<p>Rolling window features are among the strongest engineering tools in time series and behavioral data. Variables such as the number of transactions in the last 7 days, average spend over the last 30 days, or the maximum over the last 10 sensor readings are built using this logic. This approach brings the past into the model not as a single point, but as a summarized context window. However, window size and time alignment must be chosen carefully, otherwise both information loss and leakage risk may arise.</p>