did you check poloniex? last time i checked they had margin trading and they're based in the us.
Thanks, yeah I have used poloniex in the past. But for some reason it does not allow you to trade USD/BTC on margin... no clue why. This is the pair I'd like to trade.
What about the golden 100x website of bitmex? Not sure if they offer USA people because I am not from there but it is worth a look as they have that super fab 100x leverage.
Yes! this is the site I wanted to use, sadly they are closed to US residents. /: