RE: Odd trading going on?you will find some answer there from the globe September story:
Stock market operators TMX Group Inc and its biggest competitor, Alpha Group, now both have new order types designed to help traders hide their intentions when trading stocks. The idea is to enable so-called "dark" orders, which hide in the shadows of the markets and can't be seen by traders looking at the bids and offers.
Such orders are popular with traders trying to buy or sell big blocks of stock who don't want knowledge of their intentions leaking out and moving markets.
https://www.theglobeandmail.com/globe-investor/investment-ideas/streetwise/tmx-v-alpha-on-the-dark-side/article1721605/