Shares of Costco Wholesale Corporation (NASDAQ:COST) and hammering on a triple top breakout. The level is $169 and if Costco can blow through that level, it has significant upside, maybe as high as $200. Don't jump the gun and buy Costco before it breaches the level as it may not breakout, instead collapsing lower. This is a possible breakout, not a breakout that has taken place. Check out the stock chart below.