I believe i have seen a few of these behaviors wit
Post# of 72440
"Brokerage firms frequently questioned Taub and Shmalo about apparently manipulative trading patterns in the accounts such as wash trades, spoofing, and/or layering and sometimes closed the accounts. Layering is when a trader places non-bona fide orders to buy or sell securities in order to move the price of a security up or down and then quickly cancels them before they are executed. A wash trade allows the trader to create the illusion of volume by simultaneously selling and buying the same stock. Spoofing is when a non-bona fide orders are entered to encourage other traders to place orders that the original trader can exploit after canceling the fake order and entering an order on the opposite side of the market."
http://www.marketwatch.com/story/two-traders-...2016-12-12