A while back I found this map of logical trade flows. Really, really sorry as I have forgotten who made it. Must have been a great deal of work putting it together. At first I thought someone was just imagining the trade possibilities but after a while the methodology behind it started to dawn on me.
click to enlarge
Sol - Terra Trade Route
It is expected that the Sol - Terra trade route will be the busiest route in the known Universe. Sol, being Earth, and Terra, being a newer and better Earth. Does this remind you of The Expanse?
I was so impressed I started building my own map for my 'hanging out' area of the Universe. That's how I know it takes a bit of work.
Trading is not going to be my profession. I have no trading vessels and don't plan on getting any. I expect I'll be concentrating on exploring, instead.Well, you never know.
So I've done a three system chart so far. On the outskirts of the Universe. It isn't looking that helpful, tradewise. Maybe my trading instincts just aren't there. If I were a true trader perhaps the data would be more forthcoming. Maybe I need to add a couple more systems.