Did anyone ever compare NinjaTrader and OpenQuant for realtime automatic trading? I am using NinjaTrader and when multiple charts are opened and multiple strategies are running, it seems it obviously consumes more cpu resource than some lightweight charting softwares. I have little experience with OpenQuant. I am wondering whether OpenQuant would consumes much less CPU resource than NT so that more strategies on more instruments can be running on the same computer without freezing it. Also is it possible to write a pure ATS without charts in these two platforms?