There have been several people requesting a trading system and it has been asked a lot more frequently lately. The reason there is not on yet it because Stefan and Unixmad(in charge of Graal overall, they are the owners), do not want there to be one because they tink it will make them lose money/cause problems. SNK is trying hard to convince them to let him make it but they are quite reluctant. Please read this before making a tradng system thread please.
tl;dr: Owners of graal, Stefan and unixmad, wont let it happen. SNK is trying.