Be aware that when stocks become heavily shorted, big players have done their research and have found flaws in the company's business model or financial outlook. But just because shorts are piling on doesn't mean this action will trigger a squeeze, as selling pressure can drive a stock downward. A stock with 15 million shares in the float is a good level to work with as a day trader. In April 2022, Weis Markets (WMK) had a float of this amount while 2 million shares were short (13%). Insiders own about 39% of the stock.