You can see AH trading on Nasdaq with the size of positions traded. We see it our on organizations stock too. Someone will come in with a quick feeler of say 100 shares of some positive or negative price thus "creating" what people are paying AH. I assume FB trades a lot more in AH but someone just throws that feeler out there to get the party started to where they think/want the price to go.
7/28/16 at 8:48am