Super Micro Computer Inc.'s (NASDAQ:SMCI) stock just sent a signal technicians rarely shrug off — and even Ken Griffin is feeling it. SMCI has now formed a Death Cross, with the 50-day moving average slipping below the 200-day, confirming that the stock's downtrend has deepened just as Citadel Advisors sits on a sizeable paper loss.Track SMCI stock here.For a name once grouped with the AI hardware winners, the chart has taken a clear turn.SMCI Stock Momentum Has Broken DownChart created using Benzinga ProSM ...