Movement is a brand's close-over-close rank change on an AI visibility index (up, down, unchanged, new entry, or re-entry). It is the AI-ranking equivalent of a price change on a ticker.
Movement notation is compact: ↑3 means up three positions since the last close, ↓2 means down two, — means unchanged, NEW marks a first appearance, RE a return after dropping off. Every movement compares against the prior close, never an arbitrary window.
Sustained movement matters more than a single week. One position swap can be answer-to-answer noise; a brand climbing across four consecutive closes reflects something real changing in the sources and answers underneath.