A number of medical equipment makers are either in buying range or working on bases as the industry races up IBD’s group rankings. Idexx Laboratories (IDXX), a provider of diagnostic and health care services for veterinarians and livestock breeders, retook a 140.10 buy point of a cup base Tuesday. But volume was routine. The stock initially cleared the buy point Friday after posting a better-than-expected 25% jump in Q3 profit.