Please help explain. It's my first time using omniwallet, tried to buy AGORAS using Tether. I would like to know why in the options on how much to pay btc for miners, it is on Total transaction cost: 0.00004368 BTC and my total BTC From address available: 0.00470476 BTC. Once I executed the order, all my total BTC from address was almost completely gone.    Care to ask why it get almost all my BTC? Thanks for the explanation in advance.

PS, we need exchange asap. maybe kucoin or hitbtc would be a good start.