No one is powerful enough to manipulate market for long.
Except when the big exchange uses bots to fake volume. Like mtgox and the Chinese exchanges.
peligro + 1
lol madken -1
btc-e is only doing 15k day trading (300 coin max at play at any on time/order) thus very easy to continually mess with prices on these crappy exchanges that have locked down deposits and withdrawals to only be useful to the little fish