www.optioncreator.com basic functions but it's free, you can input as many legs as you want and you can see the final payoff as well as the payoff curve at different DTE and vol levels
CME has a strategy simulator and frankly all their stuff is excellent but I'm an old dog who sticks to what I know in UK index options. You have to register it's free and worthwhile- I only use this: https://www.cmegroup.com/tools-info...s-calculator.html?utm_source=LINKEDIN_COMPANY
Would you like to give a try to this one (a windows app, best used with 2 screens). No limitations on legs and accepts any arbitrary combination of whatever options: if yes drop me a message: I will send you a download link (in exchange for suggestions for improvements) Limited offer, open to anyone interested, of course
ok, since I am getting so many requests, I am just making a public download page. Feel free to get it, and in case report whatever bugs (or whatever request for more features): "OPS - OPTION PAYOFF SIMULATOR" (no limits on the number of options)