Seasonal window

A seasonal window is the range of days before and after a chosen reference point, often an event day or calendar date, over which a market's historical behavior is measured. Setting the window defines how wide the study around day zero will be.

For a bullion trader, the seasonal window separates a broad monthly tendency from a tighter event-driven one. Studying the days surrounding a festival, a policy meeting, or a key data release can reveal patterns that a whole-month view would blur.

The window setting changes the question being asked, so it should be fixed deliberately. A monthly tendency and an event-window tendency can have very different sample counts, and mixing the controls produces a chart that answers the wrong question.