Below are the S&P and 15 minute and daily charts with the immediate important levels marked on them. Also, notice the trendline being formed which was earlier acting as resistance but is now acting as support.
Resistance - 1198.75, 1200, 1207,1227
Support - 1173, 1183, 1193
Here is the link to today's Chart of the Day.
Take care and good luck!