There seems to be a bug with traders. This is what happens: 1) Market (my own or ally) has been destroyed by an enemy and I build a new one 2) I reassign the new market (right click) on another market 3) I select traders and right click on ally market ... 4) Traders stop at ally market and do nothing There is a topic saying the same thing, but only to enemies and neutral: "But if you set the destination point and create a trader/merchant ship, the trader/merchant ship just goes to that market/dock and stops there. So it's not possible to trade with enemy or neutral players (the same goes for gaia markets)." There was a ticket that has perhaps already dealt with this issue for A18? http://trac.wildfiregames.com/changeset/15854