One of the advantages of a cloud set up for trading over say a web application is that you have very little outbound data. Outbound data get really expensive. A trading set-up will have a fair bit on inbound data but not much outbound data. Some providers even give you inbound data for free. If latency is not an issue and you're price sensitive, have a look at go-grid. They offer Windows for VPS. Runningbear
cloud not so much for trading but for research. I think these are good http://www.iron.io/ amazon redshift pretty much anything that takes away the burden of administration.