http://bitcoincharts.com/charts/bitstampUSD#rg5zig15-minzczsg2014-10-06zeg2014-10-06ztgSzm1g10zm2g25zv
If you look at the one minute chart, you see that the largest buy was max around 4.5k.
http://bitcoincharts.com/charts/bitstampUSD#rg5zig1-minzczsg2014-10-06zeg2014-10-06ztgSzm1g10zm2g25zv
Thanks, that's exactly what I was looking for. Bitcoincharts provides a great service. Here's screenshots of the charts.
http://bitcoincharts.com/charts/bitstampUSD#rg5zig15-minzczsg2014-10-06zeg2014-10-06ztgSzm1g10zm2g25zv
http://bitcoincharts.com/charts/bitstampUSD#rg5zig1-minzczsg2014-10-06zeg2014-10-06ztgSzm1g10zm2g25zv