Scans every marketable item for price gaps: buy where it's cheap, sell it on your home world. You can buy while visiting any world in scope, but only sell at home.
Click a world row (or press Enter on it) to see its cheapest listings. “Cost for N” buys whole stacks cheapest-per-unit first and includes market tax. Prices are crowdsourced via Universalis and can lag the live market board — check the “Updated” column. Universalis caches at most 100 listings per world, so “Units” is a lower bound (shown as N+) on very deep markets.