The way that I deal with being mobile is that I use a Virtual Private Server. This allows me to use the desktop version of IB (which I use for options) and Tradestation (which I use for futures). I've been using speedytradingservers.com as my VPS for over a year and they have been very reliable. You can even select different server locations based on where you are in the world and what exchange you want to be close to.