Quantopian is building the worlds first algorithmic trading platform in your browser. Quantopians tools and support give quants what they need to learn, create, test, trade and reap the benefits of quantitative finance for themselves. Unlike competitive solutions, a visitor can be testing their algorithm with Quantopian in minutes rather than months. Other approaches have high costs, limited backtesting capabilities and steep learning curves. Not Quantopian. It provides robust foundational technology for creating algorithms and unfettered access to a decades worth of trading data for backtesting. Beyond technology, Quantopian is also an engaged community where people can discuss concepts, process and performance and learn from peers and experts.Quantopian's open sourced the core backtesting code as Zipline (https://github.com/quantopian/zipline).