Tech titan Amazon.com Inc NASDAQ: AMZN closed just under $230 on Tuesday evening, extending an 8% gain since the first week of August. The broader uptrend since April remains firmly intact, with shares up more than 40% in that stretch. Yet what has caught chart-watchers' attention this week is a technical pattern that should be on every Amazon investor’s radar—the pennant.Get Amazon.com alerts:Let’s jump in and see why these can be so important, and highlight some ways investors can think about playing it w ...