Madmax -
I have had to trade in MLORF cuz TD does not do Canadian stocks and I think that the market maker for it seems to play tricks with the price. I'm not sure if he/she is expanding the spread (for profit's sake) or if they are controlling the price for other questionable purposes. I doubt that any of us can ever take "advantage" of the blantant mismatches that often occur.
Fortunately, I hope to make enough that the "pennies" won't matter.
- Panamax