A market maker supplies the quotes via API and a BOT that change when the price changes at Bitstamp. They are buying at Btc-e and selling at hitbtc doing an arbitrage.
I see thank you .
They just put a note on my account saying my verification has been denied but I'am welcome to use their platform as unverified,this means I can deposit but cannot withdraw funds .
I just tried to withdraw btc and that failed also .
This is very worrying .