TL;DR: Grand exchange updates in trade chat instead of game chat.
When you get in-games updates about your grand-exchange transactions,
I think it would be better if they appeared in the trade chat rather than in the game chat.
A lot of activities flood the game chat and these grand-exchange updates can be missed, but the trade chat is usually empty and in there it would be much more noticable.
In addition, grand-exchange transactions are a form of trading in the game, thus making it reasonable to place updates about them in the trade chat.
09-Oct-2018 12:15:30