There are the brokers which offer such low spreads but i prefer to trade on the fixed spread because i mostly trade on news and when you're trading on news, brokers increase their spread because a number of the people are in the market to catch profit from the news trading. Such low spreads are possible but our broker (InstaForex) have fixed spread of 3 on the basic currency pairs like EURUSD and USDJPY. I think this fixed spread is better than variable low spread.