i'm searching for a tool on the internet wich can me tell in realtime the following:
what is the average Price of BTC i get when i want to buy instantly on of the exchanges btc-e or bitstamp for lets say 5.000 USD
or what is the average price i get when i want to sell e. g. 10 btc.
Should be an easy application of the order book - but somehow can't find nothing
I think the chart at bitcoinwisdom will work for almost everything above that you are trying to do. To see what the average price for selling 10BTC, you can just hover your cursor right above or below the current market price to the furthest to the right of the chart.