Since the RMR update you can now download the market data. Several people have made nice programs to take advantage of this. You still have to travel to various systems to get updated data but a substantial database already exists. The main problem now is that many of the better traders have there shuttles on a macro to run the systems every day just before and after downtime when tney can corner the market
So check this link for a nice program:
http://eve-central.com/home/
Buck