Amazing how Facebook “crashes” thru whole price points - notice the insane volume once price crossed below $28. Average volume per minute prior to that was in tens of thousands, then 1.5M in one minute. The exact same thing happened yesterday while crossing below the $30 mark. It has since rebounded to above $28, but this just shows you how many sell orders are entered at these price levels, just waiting for a drop in share price. Or maybe the drops trigger some algo traders?