That's our specialty: large volume surges. Without any other flavor (i.e., direction, previous movement, etc.) Here is a strategy that looks at volume surges in either direction: Feel free to modify this more specifically to your trading plan. Apologies for any delay in replying http://www.trade-ideas.com/View.php?O=40000000000040000000000000000000_1d_0&QSV=5&QUNOP=5&MinPrice=5&MaxSpread=15&MaxDNbbo=.15&MinVol=500000&MinRV=5&MinVol5=250&WN=Surging+VOlume