This isn't a Quantopian alternative, Quantopian let you write real code and automatically trade based on it. It also let you trade buckets of stocks, not just one.<p>This is just a very basic strategy backtester, there are plenty like it, you can find them if you Google "technical backtester" and some of the brokers (e.g. TD Ameritrade) even let you do such backtests in their platforms (e.g. Thinkscript, though that's a tad more Quantopian-like than this tool).<p>If you want a _real_ Quantopian alternative, look at QuantConnect [0]. Interestingly, it's .NET based and you can write C#, F#, Python or whatever you want.<p>And the trading engine is open-source [1] and you can run it yourself.<p>[0]: <a href="https://www.quantconnect.com/" rel="nofollow">https://www.quantconnect.com/</a><p>[1]: <a href="https://github.com/QuantConnect/Lean" rel="nofollow">https://github.com/QuantConnect/Lean</a>