I've been trading Iron Condors on the SPY for over a year. Every month, 40 days before expiration, I sell contracts that are 15% OTM and then close them out 10 days prior to expiration. This strategy has been netting me a tidy profit until October. When the market tanked, I was well in the money. I rolled them into November, but I expect to fully lose there as well. I am always looking to learn. What can I do in the future to protect myself against such significant market moves?