1945-1950 is key support now and the hourly 200 line is what currently keeps $SPX from breaking higher.
Towards GDP - Potential pullback towards 1945 or breakout towards 1980 and 2000.
I'd place stop loss below the 50 line (hourly)
If you want to learn more - http://goo.gl/4JWJeH
Yesterday's setup - http://goo.gl/wmhs1C