Thanks a lot for your reply! I am trying chartvps's "Daytrader VPS" with 3 cores of 3.8GHz and 8GB of RAM. This is because the latency from their NYC server to IB's server in Newark is 2ms VS 7ms from Amazon's AWS. For the time being, I am using it to test out some simple automated trading strategies which can be latency-sensitive when the market opens. Do you expect the VPS above to perform OK without much freezing? Thanks!