Who is taking care of Path of exile Trade site ? the external one

I would like to message him.

Or if they read here sometimes.

Can they add A filter that the user manually enter what make the ratio instead of their own algo. cause a lot of time - its not in order

EX :

in the setting menu -
1 ex = 2 alc or 3 regal or 6 vall
1 divine = 180 EX or 18 chaos or 3 anul

and for all the currency that we dont input ratio - then its their automatic system.

This will fix a lot of trade site manipulation.

thanks