user1878: What time of day (in GMT) does the volume get reset to zero?
I'm trying to correlate this with the charts, however I'm unclear as to when this actually would occur

user153: If you are referring to the volume displayed at the top of their site, that's a rolling 24 hour number.
If you are referring to the volume displayed in BitcoinCharts, then that is 00:00:00 to 23:59:59 UTC.
Also, the Bitcoin Charts metrics are per-market, so BTC/USD has its own volume as does BTC/EUR, BTC/GBP, BTC/JPY, etc. Whereas the volume number from Mt. Gox's site appears to be the total for all seventeen currency markets they operate.

user2593: It is a moving sum, it sums up the volume for the last 24 hours of trade.
Bitcoin trading never closes, so the usual way of calculating volume as the sum of trades that happen between the open and close of the market doesn't apply.

1878: <p>What time of day (in GMT) does the volume get reset to zero?</p>

<p>I'm trying to correlate this with the charts, however I'm unclear as to when this actually would occur</p>
 153: <p>If you are referring to the volume displayed at the top of their site, that's a rolling 24 hour number.</p>

<p>If you are referring to the volume displayed in BitcoinCharts, then that is 00:00:00 to 23:59:59 UTC.</p>

<p>Also, the Bitcoin Charts metrics are per-market, so BTC/USD has its own volume as does BTC/EUR, BTC/GBP, BTC/JPY, etc. Whereas the volume number from Mt. Gox's site appears to be the total for all seventeen currency markets they operate.</p>
 2593: <p>It is a moving sum, it sums up the volume for the last 24 hours of trade.
Bitcoin trading never closes, so the usual way of calculating volume as the sum of trades that happen between the open and close of the market doesn't apply.</p>
