i discovered a data source that has an excel add-on to retrieve stock data (no options) from their
api. they have a limited free subscription level, but you have to sign up and get an api key. you're
limited to 8 requests per minute and 800 requests per day with the free subscription. if you don't
trust excel macro add-ons, you can construct a REST url and download csv data. when i find some time i'll
write some macros to download data directly from excel and make it available. the url is
twelvedata.com. i signed up but have only played with their demo data so far.