I've got an order in at Fido to sell my OIH Sep/Oct 135 calendar at 3.20. Looking at the TOS trade screen I see the Bid jumping around 2.90-3.00, the Ask pretty solid at 3.40. But every once in a while I see Last at prices like 3.50, 3.40, 3.30. I think I even saw one at 3.70. What's going on, and why doesn't my 3.20 order get filled? Edit: Maybe I figured out what's going on. I think that TOS is using Last price from the individual legs (currently 10.30 and 7.00) to come up with the Last price for the calendar. Never mind. (I'll leave this here instead of deleting in case someone has a pertinent comment.)
Wiseguy: "Hey Hoser, then why not place individual orders?" Eliot: "Done." Edit: Filled each leg for overall credit of 3.20.