Huge blocks of shares in last hour

[jft310]

Its called a limit order. Example. Heres what you say to the the trading desk. I will buy 100,000 shares of IOC at $76.50 or below. They cross the trades from the seller the shorts maybe to the long. But its called stealth accumulation. The trading desk literally call up the people they know that have shares on either side and get an order executed cause that how they get paid off the spread.