Let me preface this by saying I don't know a whole lot about stocks.
That said, I like the way that you get right into the content, although I believe a more formal homepage letting you know the various features of the website are. Perhaps that's not needed and your users already know what to do. The site is fast and plain, but I don't think it really needs any images.
I think the usability (for someone with knowledge of the stock market) is high. I'd imagine that they need quick access to information and clearly marked sections so they can move quickly.
You may want to conduct user testing with your target market to determine if your website is succeeding in solving your user's problems.
Good luck!
as the name of the site reads intraday. i guess it should be updated quiet frequently with the data.
say something like every 3 min or 2 min.
I am not using harsh words here, but there are many sites which give more FRESH information and are more detailed.
You need to improve.