FYI:The Investment Industry Regulatory Organization of Canada (IIROC) is the national self-regulatory organization which oversees all investment dealers in Canada.
It has clear rules regarding margin trading.
In Canada, IIROC margin rules allows investors to borrow up to 70 percent of the price of the securities to be purchased on margin (If the stock is eligible for reduced margin and listed on the LSERM list published by IIROC).
The percentage of the purchase price of securities that an investor must pay for is called the margin requirement.
To buy securities on margin, the investor must first deposit enough cash or eligible securities with a broker to meet the margin requirement for that purchase.