Because margin accounts are not registered, and do not come with any special tax benefits or limitations, you are free to transfer any amount of cash or investments into these accounts.
You can transfer both Canadian and U.S. dollars using the “REQUESTS” -> “Transfer Funds” page, and can also transfer investments using the “Transfer Investments” page.
Explore the related articles in this lesson for visual instructions.
Please note: A transfer of cash or investments into a margin account is not suitable for covering a Margin call when your buying power is negative.
Please see this article for more information.