At this moment in time, modelling places the expected range of movement between the 189 and 210 strikes for the next 45 days or so, with the 1 SD lines being at 181 and 218 strikes, and we are virtually smack dab in the middle of the range from the October 2014 low to the 2015 high (the .50 Fib is at 1974), which I view as quite workable from an iron condor perspective. Here's an example of a fairly delta neutral IC setup in SPY with the short call end of things placed at the edge of the expected range of movement and the short put side placed at the 1 SD:
Oct 16 178/181/210/213 SPY IC
Max Profit/Buying Power Effect: .88 credit/contract; 2.12/contract
Notes: I have previously shown "Max Profit" and "Max Loss" figures for the setup. However, I think describing things as a potential "Max Loss" is inaccurate in the vast majority of circumstances, since a "Max Loss" implies that you do nothing at all in the event that a side is breached, and you allow the setup to go to max loss at expiration -- something I never do with index trades. Faced with a breach of a side of an IC , I almost always roll the breached side out for duration and credit and attempt to improve the strike prices if possible in that scenario. Consequently, the "max loss" is, in fact, never realized.