The typical trading range for the day is $100 to $110. Scenario 1: So someone offers (is willing to sell) a limit order at $100. Buyer bids at $110. They

The typical trading range for the day is $100 to $110. Scenario 1: So someone offers (is willing to sell) a limit order at $100. Buyer bids at $110. They wait until the other order appears and cross according to some market rules (perhaps at $100, $105 or $110), no-one else gets anything. Scenario 2: HFC works out the trading is in range $100 to $110, puts bids in at $104, offers at $106, and makes $2. The sellers gets $104, the buyer pays $106 and both are better off than scenario 1?