@Mímir launching a cd or shooting at it will change the base to become hostile to you. If the base is heavily defended the trader can just stay there close to the base.
But usually if a shield goes up, it will stay up somewhere between 5 and 10 minutes I think, so if the PoB doesn`t have weapons or not to many go for it, otherwise, the trader will just sit there protected by the PoB.
