Volume disparity, the number of large buy days within a short time period. Large buys as in 1.64million shares in Dec. No large buys within a short period of time as one tracks back 200 days: http://www.profitspi.com/stock/view.aspx?v=price-and-chart&p=13558&i=IRNG&pv=recent-symbols&pp=IRNG#&&vs=634928973512040539 Then too, the less trades per day also are a clue as a possible front-load for an event. watching