Portfolio Margin only works if you can hold the long and the short in the same portfolio. I haven't seen a way to do that in the USA.bitcoininthevp wrote: ↑Wed Mar 10, 2021 6:24 pm If 5 BTC is the minimum and that too big and you can’t portfolio margin or find a broker or another exchange that will help then I guess it won’t work for you.
And, to be clear, I wouldn't have any issue with the trade if you could do it this way. I would probably try it.