I trade on local exchanges in Europe, but my HFT strategies need S&P 500 e-mini futures data (ES). I don't need to trade ES, but I need real-time data and I want to have it as fast as possible.
I've tried http://www.zen-fire.com/ and it works fine, but probably something better exist?
Or maybe (just maybe...) I can use another instrument that located somewhere in Europe and has a good correlation with ES?
I only need "last deal price" if this is important.