user22: Blockchain.info lists both "Trade Volume" and "Estimated Transaction Volume" in both BTC and USD. It occurred to me that the ratio of one to the other might be a useful metric in determining how much of the Bitcoin market is currently speculative versus how much is actually being used for trade.
I would be interested to see if there were, for example, a much higher trade:transaction ratio during the buildup of the bubble than in previous or current days. It might also be a useful metric for determining whether the bubble is truly over and for predicting Bubble 2.0, should one ever occur.
Does anyone know of a good historical source for this data, or perhaps have both the programming acumen and time available to create a simple graph? Or have I missed something important, economically, that makes this information less useful than I'm currently assuming it to be?

user153: You can access the data for each currency on each exchange with the Markets API from BitcoinCharts:
For example, for USD:

http://bitcoincharts.com/charts/chart.json?m=thUSD
http://bitcoincharts.com/charts/chart.json?m=mtgoxUSD


22: <p><a href="https://blockchain.info/stats">Blockchain.info</a> lists both "Trade Volume" and "Estimated Transaction Volume" in both BTC and USD. It occurred to me that the ratio of one to the other might be a useful metric in determining how much of the Bitcoin market is currently speculative versus how much is actually being used for trade.</p>

<p>I would be interested to see if there were, for example, a much higher trade:transaction ratio during the buildup of the bubble than in previous or current days. It might also be a useful metric for determining whether the bubble is truly over and for predicting Bubble 2.0, should one ever occur.</p>

<p>Does anyone know of a good historical source for this data, or perhaps have both the programming acumen and time available to create a simple graph? Or have I missed something important, economically, that makes this information less useful than I'm currently assuming it to be?</p>
 153: <p>You can access the data for each currency on each exchange with the Markets API from BitcoinCharts:</p>

<p>For example, for USD:</p>

<ul>
<li><a href="http://bitcoincharts.com/charts/chart.json?m=thUSD" rel="nofollow">http://bitcoincharts.com/charts/chart.json?m=thUSD</a></li>
<li><a href="http://bitcoincharts.com/charts/chart.json?m=mtgoxUSD" rel="nofollow">http://bitcoincharts.com/charts/chart.json?m=mtgoxUSD</a></li>
</ul>
