The window ladder

Four rolling windows (2, 3, 5, and 10 minutes) computed simultaneously and shown side by side, each cell displaying its σ value colored by direction.

2m +1.8σ    3m +2.4σ    5m +4.2σ    10m +1.1σ

The ladder answers one question at a glance: is this flow a burst or a campaign? A spike in the 2-minute cell that the 10-minute cell ignores is a burst. All four cells leaning the same way is a campaign.

Persistent-vs-transient separates mechanically different market episodes, and each mechanism has a characteristic timescale. A cell shows -- while its own band is warming up or the feed is stale.