If you've got a budget in the 000's, you might try NxCore -- http://nanex.net/. They provide full feeds of NBBO/Level 2 for various markets, accessible through their API which also works for real-time quotes (which of course you'd have to learn).
Addin for excel from: http://finance.groups.yahoo.com/group/smf_addin/ Google Gummy stufff for some other examples of using Yahoo data. HTH
the question itself doesn't make any sense to me..but since you have only 2 posts-you will be forgiven this time you need data for what? stocks?options? futures?currencies?cfd's? daily?intraday?tick data? which exchange? nyse,nasdaq,toronto,london? iq feed is relatively inexpensive and user friendly and support a lot of third party soft http://www.iqfeed.net/
Hello, I need data just as Gurufocus.com has for all the historical financial data of a company (stock prices, balance sheets, etc). I'm creating a app ( http://stockding.com/ ) that could make good use of that kind of service. I'm not sure if IQFeed is what I need for that. I've heard about Zacks Financials but I can't get any answer from them. Thank you and sorry the bad post.