I have noticed an increasing trend of seeing quotes for Bitcoin pairs, i.e., BTC/EUR and BTC/USD; anyone trade these? And if so, what broker do you use and what are the spreads?
https://bitcoinwisdom.com/ includes the top bitcoin exchanges. Huobi has no trading costs, only the difference between the bid and ask. This spread changes every minute because its based on who is willing to offer and who is willing for bidding.
Bitcoin exchanges are fully transparent with full market depth. If you need anymore help regarding btc trading, PM me.