Upcoming Site Maintenance

Quantopian will have a temporary maintenance outage from Sunday, June 26th, 2016, 12PM EDT to Sunday, June 26th, 2016, 8PM EDT in order to perform server maintenance.

During this outage, updates will be published on our status page. We apologize in advance for any inconvenience.

Introduction
What is Quantopian?
How do capital allocations work?
Is Quantopian free?
Who owns my algorithms?
Are my algorithms secret?
How do I get started?
Do you give investment advice?
Live Trading
What brokers do you support?
How can I open a brokerage account?
How do I add a Robinhood or IB account to my Quantopian profile?
Can I add another algorithm to my existing real money account?
What happens when I start (or stop and re-start) a live algo against a real money account with existing positions?
Does Robinhood support paper trading?
How do I create an IB demo account to paper trade?
How do I add an additional username to my IB real money account that is dedicate to my Quantopian algorithm?
Why did I get logged out of my IB account?
How do you handle margin management and margin calls for IB?
What currency do you support for IB?
Data Sources
What data does Quantopian have?
Do you support Forex? Options? Futures? Bonds? Non-US securities?
Why is your close price different from other data sources?
Writing an algorithm
How do I write an algorithm?
I hate watching videos. How do I learn how to write an algorithm?
What are tips for writing robust algorithms?
How do I learn how to write Python?
Where do I get an idea for an algorithm?
What libraries does Quantopian support?
I don't know Python. Can I use R, MatLab, or Excel?
Your IDE is new to me. Can I use my own development environment?
Can I have a copy of your data?
Backtesting
How does the backtester work? What is the difference between minute-level and daily-level backtests?
How are filled orders calculated?
What benchmark does Quantopian use?
What is the difference between the 'build' backtest in the IDE and the full backtest?
Can I customize the Quantopian backtester?
How does your data track stock splits, acquisitions, mergers, spinoffs, and dividends?
Research
Why did Quantopian build research?
What is beta? Why is this tool beta?
How is Quantopian going to expand this tool?
How should I use research and the IDE together?
When and why are there maintenance windows? How will this impact me?
What about my IP and the ideas I am researching on Quantopian's research platform?
Privacy and Security
Is my algorithm secure?
Company
How does Quantopian make money?
If you don't charge yet, how are you paying for this?
Who is Quantopian?
What's your roadmap?
Can I live trade?
Is this high-frequency trading?
How can I add a photo to my profile?