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Getting technical: SPY is overbought, but here are key support levels

January was a banner month for the S&P 500 and for the SPDR SPY ETF that tracks it — the 8th best month going back to its beginning in 1993. But now what? How should traders navigate this kahuna? Brian Shannon, CMT and founder of alphatrends.net, joins Yahoo Finance's Jen Rogers and Brian Sozzi to break down SPY and field a few technical questions about General Electric (GE).