Yes, it's quite the money maker, but what I'm trying to get is a feeling for what kind of trading makes sense, not just the one definitive "buy foo at bar and sell it at baz for quux" thing. Say I'm doing contract transportation and want to make the most of the planets on my route with the leftover cargo space, so I can't pick out the non-plus-ultra milkrun and concentrate on two goods. That's why I wanted to know what the information about a planet that can be read from afar actually signifies[1]. This feeling does come, slowly, though. The info about precious metals and gems was very helpful in making a little extra cash by carefully observing prices on my way without any pressure to sell it now to make room for the cheap stuff, I'm extremely thankful for that.As far as economics are concerned, you've hit the button on the furs/computers trading thing
I'm very glad that there's a project to answer exactly these kind of questons. At the moment, asking them is all I can do, since good answers take lots of experience.
[1]: On that note: I guess the rest of the info on the planet screen is rather less significant; things like race, gross product, population, and the "flavour text". Is that right?