Questions about margin trading (bitfinex)

[atlosas]

Hello, i have these questions.

1. What is the maintanance margin 15%. Does that mean that if i open a buy order for 1000$ with leverage 3.3:1  i have to have 150$ waiting in my account?
2. Can you explain the leverage 3.3:1. Does that mean for 1000$ i can borrow 3300$ or 2300$?
3. For example i have 100$. O borrow 330$ more (leverage) and buy 1 bitcoin at 430$. How much does the price have to go down for me to have my position force liquidated.
4. I see there are swaps for 3 days, some are 30 days. For example i borrow money for 3 days but doesn't sell after 3 days. Does my position is force liquidated to repay the lender?

Thank you

[atlosas]

Noone knows the answers? I guess the question are pretty good then

[Jamacn]

Go here to find the answer: https://bitcointalk.org/index.php?topic=229438.0

you can find common exchanges on here

[atlosas]

I can't find the answers. This is complicated matter for me. If some1 could find them and post them here, would be great