I would suggest http://bitcointicker.co - There are 7 choices (exchange charts) constantly updating, including bitstamp, btc-e, bitfinex, for $, and kraken for euro. also you can choose to "stretch" the charts 10 min, 1hr, 3hr, 12hr, 24hr, 3day, 7day, 30day, 3month, 6month, and All Time.