STOCK CHART REVIEWS DexCom Inc (NASDAQ: DXCM ) Northland Capital downgraded DXCM to underperform. That action was enough to create a devastating gap down below the 50DMA and forced me to abandon ship and lock in my remaining profits. I will be keeping an eye on DXCM in case I can get back in at an even lower price. I explained my bottom-fishing on DXCM in " The Danger in DexCom…and the Opportunity ." DexCom, Inc. (DXCM) broke down thanks to an analyst downgrade. Macy's Inc (NYSE: M ) Macy's increased guidance and was rewarded with a pullback.