Google spreadsheets are great!
And now you can import realtime Bitcoin quotes directly into it.
Use:
=GOOGLEFINANCE("btcusd")
for Bitcoins vs. US-Dollar.
It even works with EUR:
=GOOGLEFINANCE("btceur")
The Quotes USD vs. EUR btw is:
=GOOGLEFINANCE("eurusd")
for Europe Customers
for US & Canada Customers

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