Having trouble with Bitfinex exchange buy. I'm trying to do a limit order, but can't get it to work. I put the price in but then when I try and figure the amount in the other column, it keeps telling me "not enough balance". But it's less than what I have in my exchange wallet. Is there any way to set it for "max amount" like they have on Binance and other exchanges? Very frustrated and the price keeps going up and I can't make my buy.