Okay, normally I'm not one to go against the flow, but do believe there is something important if not innovative to contribute here.
The fact that someone with rank can anonymously downvote on what seems a rather sound and pertinent question, without sharing any comment nor criticism, does not reflect well on this forum itself, if it is to welcome expert knowledge and discussion on even developing frontiers in personal finances.
To me this is VERY similar to questions about portfolio tracking such as Online tools for monitoring my portfolio gains/losses in real time? ...the key difference being: what might be some emerging tools that include support for more asset classes that just stocks (i.e. options).
Even the search term "Google Finance" yields quite a few topics on this site itself, some very popular given the chance: https://money.stackexchange.com/search?q=Google+Finance