Frequently bought together is one aito.._relate over baskets: of the baskets that contain the anchor, which other products turn up in them, and how many times more often than in baskets at large (lift). A product needs at least 3 shared baskets to be listed, and the counts sit next to every ratio. Measured against plain co-occurrence counting it finds the products each anchor is really bought with as often — parity, not better. Similar products is a _search over the anchor's category, scored here on supplier and price — a hand-weighted rule, not a prediction.