Costco Stock Rallies On Digital Sales, Nears Buy Point | Investor's Business Daily BREAKING: Futures Rise As Trump Sees Iran Exit In 2-3 Weeks Costco Wholesale COST $ 993.10 $3.48 0.35% 35% IBD Stock Analysis IBD Composite Rating 95/99 Industry Group Ranking 37/197 Costco Wholesale Flat Base Flat Base One of three positive chart patterns to look for when doing technical analysis. It usually occurs after a stock has advanced off of a "cup with handle†or "double bottom†pattern. The "flat base†moves str ...