What am I not seeing?

It's an option charting program I wrote about 15 years ago in C.

 

Nice. I need something similar in its visual simplicity. What would you recommend? TOS? OptionVue? If you know of something cheap and Mac-friendly that would be optimal.

 

I don't know if you can get Excel to run okay on a Mac (Windows compatibility mode?), but here is a fairly powerful free Excel-based option grapher. I just loaded it up and it seems to work okay. It will do 6 legs with a couple of stock trades too. You can pay for an upgrade to get lots more features, but looks like the free version would be fine for me. Hoadly has been doing Excel option programs for many years.

http://www.hoadley.net/options/strategymodel.htm

 

Ah yes, Hoadley. Excel on Mac generally words unless VBA is required. Thanks.