The sum of the trade data is on the right hand side when you select an item to highlight, it will show if the station/system you are in imports, exports or doesn't trade that item and the systems that it trades with. Note, some items may be imported from one system and exported to another. That is the result of trade data, there is no big list with prices from other stations or systems unless you go there and make it, or use a 3rd party tool, there are some out there to help. Pencil and paper work fine too.