Exhanges before and after Dec 22

[Lee-2017]

I think there is something more than meets the eye on Dec 22.

Before Dec 22: i used to be able to buy on one exchange and sell on another, make a few bucks. There ALWAYS room to do this with a few coins on every exhange.
After Dec 22: as if by magic, the price of each and every coin on each and every market is within very very thin limits

not sure how this happened, but it did and you can check obviously.