You can open a margin position by selecting Margin in the Order Form box, next to exchange, and placing your desired order.
Selecting Advanced Funding Options (3 vertical white dots) in the Order Form box provides quick access to funding parameters. If you have not manually reserved funding, Ethfinex will automatically acquire funding for you at the rate currently available. Alternatively, you can manually reserve funding via the Funding tab and use it when you decide to open a margin position.
In an effort to dissuade manipulative funding behavior and ensure fair platform use for all, Ethfinex will charge one full days interest to the borrower on any funding that is borrowed and subsequently returned without being used in a financed position.