I have been unable to transact Zenith in my CIBC  self directed investor's edge account other than by phone through a trader  for over a year. It was considered an expert trade. Minimum cost per trade of $50 no matter how many shares I wanted to buy or sell.  And no ability to keep the order open until I get a total fill. It's $50 per day whether I ended up with one share or 100,000.