Levels to watch on S&P 500 are :
Resistance Levels
1. 1200 Immediate level to watch out
2. 1275 is level that broke the entire market down.
Support Levels
1.1125 level is crucial level to watch out
2.Breaking the previous will take us to 1000 on its way t0 900 levels.
There are no prominent central banker schedule for this month (FYI :http://www.centralbanknews.info/p/central-bank-calendar.html) but remember the central banker can intervene any time they want as they are busy with their heads banging all during the crisis which started in 2007.Did FOREX (USD/JPY)a possible leak of QE3 ahead of the FED intervene.Take look at the charts with long candle suggesting a devaluation of dollar in play.
Happy Trading.Good Day