With the stock market hitting new all-time highs, it becomes difficult to find stocks under 20tobuy.Althoughthestockpricedoesn′tmatterasmuchasthebusiness,itwouldbenicetofindgoodcompaniesatlowpricestoscoopuptheirshares.Source:www.hudsontech.comBelowarethreestocksunder20 to buy today. You will thank yourself for getting in now before they run up the score — and their stock price — very soon. Hudson Technologies (NASDAQ:HDSN) is the leading provider of reclaimed refrigera ...