That answer by Bard is incorrect. You can currently use ThinkOrSwim on our servers. Thousands of traders are using ToS on our trading servers daily. You just want to make sure you pick at least the 8gb RAM or more from our options here https://ninjamobiletrader.com/#download because ToS has higher memory requirements than NinjaTrader.
New Dedicated Servers in Chicago now available with <1ms ultra low latency! Need more RAM for your trading? 32gb and 64gb Dedicated servers now back in stock! With more RAM, strategy analyzer, optimizations, and back tests finish in blazing fast speeds. The new larger dedicated servers are also a great option for running automated strategies, copy trading, and running multiple trading applications at the same time.