This could well be problematic under UK financial regulations. You are giving financial advice, which is a regulated activity and as far as I can see hard to do

This could well be problematic under UK financial regulations. You are giving financial advice, which is a regulated activity and as far as I can see hard to do with automated services under the existing rules, for personalised services like this (and also if you charge). Most financial advice is from journalists who are basically exempt from the rules, or are generic not personalised. The situation in the US is fairly similar I thought, would be interested in the legal situation there, as I think this type of service is very useful for people.