Legend

Bitstamp = European based Bitcoin exchange (trading on BTC/USD) link
Btce = Russian based Bitcoin exchange (trading on BTC/USD) link
2606 and 2624 = number of trades on given day
L-ave (200) = smoothing function, 200s timestep
Volume Bars

3.54M and 1.02M = 3.54 million USD and 1.02 million USD intra-day volume
Height of bar = USD volume across 720s (or 12min) interval. Each day is divided by 120