I like Thinkorswim's interface and analytics for trading options spread. In particular I like: * One click "create duplicate" or "create opposite" trades * Easy/fast spread trade entry with good keyboard shortcuts - it's quick to enter the put and call sides of an IC, make adjustments to see how it affects the risk profile, and then enter the trade * The simulated trades + risk profile analytics for options - valuable when watching a vertical spread or iron condor and tweaking it in real-time Other brokerage software I've seen is really clunky and doesn't compare. However, with recent issues around ToS's platform (I still have errors on my YTD profit/loss that they haven't corrected after over a month), I want to make sure I have an alternative/backup in case I ever decide to switch. Does anyone else have recommendations for other brokerages with excellent software for trading options?