I personally got a call from Questrade today regarding margin calls as remember when I accidentally bought to positions when it was supposed to just be one in my TFSA. The Questrade App which I wasnt familiar with switched to my Margin and I accidentally bought twice.
I had a chance to sell them but figured I was safe in the mid 2's and now had to transfer funds to cover.
Still holding everything though and am not selling at these supressed levels due to manipulation.