Re: 'in play', both AMC and GME recently had an in play alert from E-Trade. Right now, I have no idea what specific criteria determine which companies receive that designation. But both of them have run-up big recently. We need the volume and exposure, even if the alert doesn't mean anything, so I'll take it :-)
Longer version...What Does "In Play" Mean? The term "in play" refers to a firm that becomes a potential takeover target or puts itself up for sale with multiple bidders. When a firm becomes in play, news spreads about the potential deal. Speculation leads the share price to increase in value, making it much more volatile.