What is a strategy sleeve?

A sleeve is an isolated slice of a brokerage account dedicated to one strategy: its own cash, its own positions, its own profit and loss. The isolation is enforced by the order layer — every order is stamped with its strategy, validated against that sleeve's own cash, and every fill is credited back to the sleeve that ordered it. Sleeves are what make multi-strategy accounts sane: you can run a dip-buyer, a trend-follower, and a weekly swing system side by side, compare their results honestly, top up the one you trust, and pause the one you don't — all without any of them noticing the others exist.