EVE Online trade hubs

Which markets are worth flying to: every station we read, ranked by how many live orders it has, with the threshold up to you.

What counts as a hub

Live orders, buy and sell together. A station makes the list once it has at least as many open orders as you ask for - 1 000 by default. Items shows how many different things are traded there.
NPC stations for everyone. Their markets are public in the game, so they are public here too.
Public structures for everyone. Player citadels whose market is open to all pilots - checked against the game every day.
Your structures when you are logged in. Player citadels you added appear only to you, and only while they give you prices - a paid plan, access in the game and a recent access check.

Planning a trip? Hubs on your route lists every market within a few jumps of the way and the best order to visit them.