Well here's two choices: http://www.quantopian.com/ http://www.quantopian.com/ The above lets you do algo trading online. And there's: http://tradingclearly.co

Well here's two choices: http://www.quantopian.com/ http://www.quantopian.com/ The above lets you do algo trading online. And there's: http://tradingclearly.com http://tradingclearly.com That's doesn't do paper trades, but it could help you with your real-life trades.