Apple, Caterpillar, and Target are some of today's stock picks: Pro Market Movers May 18

Jim Cramer, Brian Nagel of Oppenheimer & Co., Amit Daryanani of Evercore ISI, Oliver Chen of Cowen, Mark Mahaney of Evercore ISI, Toni Sacconaghi at Bernstein Research, Steve Weiss of Short Hills Capital, Joe Terranova of Virtus Investment Partners, Jenny Harrington of Gilman Hill Asset Management, Bryn Talkington of Requisite Capital Management, and Stephanie Link of Hightower Advisors on why they are buying, selling, or holding specific stocks and ETFs.