While exchanges have come and gone from the CoinDesk BPI over time, we understand a single average doesn't suit everyone. Once on the price page, just check the boxes of the exchanges you want to view, click 'Update Chart' and data from the relevant exchanges will appear on the graph.
At the moment, you can view individual prices from Bitstamp, BTC-e and Mt. Gox, but we plan to add more exchanges in the future.
When you hover your cursor over the chart, a box will appear detailing the price on each exchange at that particular time/on that particular date.
The graph enables you to view price data from any period in bitcoin's history since July 2010, when the price on Mt. Gox was a mere $0.07. You can also see when the CoinDesk BPI came into effect (1st July, 2013) and when the price on Gox plummeted way below that recorded on the other exchanges and the CoinDesk BPI (earlier this month).
If you want to download the price data you are looking at, just hit the yellow 'Export' button and you can select your preferred format from the drop-down list, for example a PNG image or a PDF document.
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