Amazon.com ($275.59) had a hold rating back on Feb. 5, but with new monthly benchmark data from ValuEngine the stock has been downgraded to sell with the stock below its Jan. 25 high at $284.72.Amazon is 71.1% overvalued with a twelve month forward P/E ratio at 171.9. The weekly chart shifts to neutral with a close this week above its five-week MMA at $266.29. The 200-week SMA lags at $175.17. My quarterly value level is $255.75 with a monthly pivot at $275.15 and a weekly risky level at $277.07, so profits should be taken with the stock between these levels. My semiannual risky level is $307.64.