I’m trading Euro-Yen futures in the GCI demo with great results but don’t want to sign up with them. Any other brokers carry a similar future?
the only liquid futures are usd pairs… cross pairs are quite illiquid, at least last time I looked (a year ago). I mean you might be able to trade 1 contract but if you try 5 or 10 you should get massive slippage, someone correct me if I’m wrong.
for futures in general I would go with a zen fire broker (fastest, most reliable execution… although connection was lost due for most of the day to power outage in chicago when i was trading last year, but broker said that was first time it happened. Obviously I had an open position when it happened, I mean that’s the way the world works… 
), if you go with zen fire, most likely you would end up using dorman but through introducing brokers because they are cheaper… like mirus, proactive futures, amp, etc.