Cryptocurrency Products Offered by IBKR

http://ibkr.info/article/3060

Cryptocurrency Products Market Data

http://ibkr.info/article/3061

Trading Bitcoin Futures with IBKR

http://ibkr.info/article/3049

Bitcoin Futures Product Page

https://www.interactivebrokers.com/en/index.php?f=25379

IBKR Margin Requirements

https://www.interactivebrokers.com/en/index.php?f=24176