Tech giant Amazon.com Inc NASDAQ: AMZN closed around the $238 level on Tuesday, leaving it less than$5 shy of February’s all-time high. It’s been a strong couple of weeks for the stock, which had to deal with a post-earnings hangover at the start of August. Investors were quick to buy into that; however, with shares just now just below the $240 mark once again, they’re right to be nervous. Get Amazon.com alerts:That’s because this is the third time in this year alone that Amazon has pressed up against that ...