Various online trading resources are available, such as Finviz.com, which provides lists of the most shorted stocks. The site has a stock screener that lets you search for trading ideas based on various parameters you can customize. You click the tab for "shares outstanding" and click the desired share amount, such as "under 20M." To find short squeeze ideas, click the tab for "float short" for a particular ticker, then click the desired percentage. By checking the list of "over 30%" short, you can get a list of stocks displaying important information such as sector, industry, market cap, price, and volume.