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Amazon.com (AMZN) had its Relative Strength (RS) Rating upgraded from 74 to 82 Tuesday. This exclusive rating from Investor's Business Daily identifies market leadership with a 1 (worst) to 99 (best) score. The grade shows how a stock's price behavior over the trailing 52 weeks stacks up against all the other stocks in our database. Decades of market research shows that the market's biggest winners often have an RS Rating of above 80 in the early stages of their moves. Amazon.com is now considered extended and out of buy range after clearing a 238.85 buy point in a first-stage cup without handle. See if the stock forms a new pattern or follow-on buying opportunity like a three-weeks tight or pullback to the 50-day or 10-week moving average. The company posted 36% EPS growth in the latest quarterly report. Sales rose 13%. Amazon.com holds the No. 3 rank among its peers in the Retail-Internet industry group. DoorDash (DASH) is the top-ranked stock within the group. This article was created automatically with Stats Perform's Wordsmith software using data and article templates supplied by Investor's Business Daily. An IBD journalist may have edited the article.