My comission paid in bitfinex is bitcoin.
I buy 10 BTC, they deduct 0.015,then I get 9.985. I don't like it. I prefer they charge me usd like bitstamp.
I contact support,support don't help.
Any one knows is that possible they charge me usd as commision?
Thanks in advance.
You need to have actual USD in your account for the fees to be deduct in USD. If you don't have USD a portion of your btc will be converted to USD at market rate to pay the fee. What I usually do is just leave a small amount of USD in the trading account to cover the fee