I know that a lot of this information is probably entirely privatized, but does anyone know of a good source of real time information on what kind of trading activity is where in the market? It doesn't need to be fast enough to actually make informed trading decisions based on it, I'm more looking to aggregate it into some beautiful graphics. For fun. Because I have personal problems.
I'd be grateful for any help!
Not sure, but I was of the opinion that Google Finance API was better than Yahoo: