For residents of Canada, Questrade is the best online broker for trading, not only on the Canadian stock market, but also the US stock market. The client experience is seamless, the tools are numerous, and commissions are competitive. A new free stock trading app is coming to Canada. Wealthsimple Inc., a Toronto-based startup currently offering investing and savings products, is launching a stock trading platform with zero commissions for its Canadian users. Popular trading app Robinhood, a natural competitor, is still only available in the U.S.