Here is the link to the Alpha Exchange. It should keep refreshing each time you look at it.

If you are buying today, you can check this exchange in conjunction with the TSX to see the bids/asks. This will give you a better idea how many shares are on the ask, if you intend to buy into it.

I just bought 1k of shares and thought I would have to pay $1.98-$2.01. But, when I checked my account, I only had to pay $1.97 because the shares were purchased on the Alpha Exchange for me.