Mika there are a lot exchanges.
try bitfinex, bitstamp for example
you can see sone charts here:
www.bitcoincharts.comi'm interested what will be your choice...

Thanks! I see, market leaders in euros are: ANX, Hitbtc, Kraken, bitcoin.de and alot of leaders in usd: + Bitfinex, Bitstamp, BTCE, Lakebtc.
Whom to choose? ease of use is also a very important metric.
Fee are second if you trade correct.
Sorry, what you mean?