I have a LOL idea
why some one not open a "exchanger" for Bitcointalk ACC in Excel and we can see open order, high rate low rate

It's not a laughing idea at all, given the fact that there is (a pretty unsorted) market demand and supply here.
But whoever is to run the main thread for it would have to know a lot of sensitive info, since you can't expect every claim to be just added to trade list before it is checked to be legit.
cheers
Exactly.
Dont make a website if you dont have the right information.