As below, cmegroup.com seems to indicate that CADUSD weekly options (expiring 25 Mar 2011) have absolutely no volume or pricing.
Does this mean they're impossible to trade? Or, if I had a broker, could I see bid and ask prices (even if no one actually got around to trading any contracts)?
If there's no volume, there's no market. If there's no market, you can't trade.
As fennec notes in a comment below, you may be able to see bid/ask prices on the trading interface: there may be people willing to trade at a certain price.
But if the potential market is so thin that there is no volume showing up, I still think that there's effectively no market. You could get stuck with a security that you can't unload if you want to, assuming you don't actually plan to exercise.
You have the TYPE set for "Weekly Volatility Options (European)". Are you sure that is what you want?. If you set it to "Weekly Options" it looks a bit better, meaning that the volume is still 0, but there are prior settlements listed, which suggests that you could probably put in a market order and still be filled, but not at a price you like.
