I have a live account with Trading.com and they do NOT allow hedging and they have FIFO rules just like all the other brokers. But I do like them for their tight spreads and MT5.
My favorite broker is Forex.com because they offer 2x more data than any other US broker that I know about.
I have tested IG, Oanda, Trading.com, and Forex.com, and my EAs made more money on Forex.com.
I plan to do another broker test to see if this is still the case.