Quote from Quah:
How can orders be fake? If they are on the books, they are real.
Quote from harrytrader:
Fake or not, stop playing with semantic and just keep to the point: it's about being on both sides of the market just for creating "impression of active market".
Quote from MartinD:
no its not. wash trading is where you hit your own bids - ie: offer 100 to sell and then buy 100 from yourself at the market and stay flat.
Sitting on both sides of the spread is just as permissible as sitting on one side alone, and you can only do that with real limit orders. If someone hits the offer, they are tradeable.


Quote from trdr_2000:
fill the book with size on the bid and at the same time be offering and then pull the bids.