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Percentage of ETF

Hi,

I am new to Quantopian and trying to build a simple algorithm. I want to buy/sell a percentage of an ETF relative to its mavg. For example if 50% or more of the ETF is trading above its moving average I want to buy, and if 50% or more of the ETF is trading below its mavg I want to sell. Is there a 'simple' way to get a percentage of a particular ETF?

Thank you

6 responses

Welcome to Quantopian! You can use the sid() function to manually add the ETF to your algorithm.

Once you've added the security, you can use the built-in mavg function to track the data. Here's a basic example to help you get started. You can clone it and start tinkering to make it your own.

Cheers,
Alisa

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Hi Alisa,

Thank you for your feedback. I have created an algorithm similar to the one you have mentioned above. However, what I was referring to was the ability to get 50% of the securities within the ETF that are trading above and below the ETF's moving average. I am not sure if there is the ability to do that as of now.
Here is an article of the concept I am referring to:

http://stockcharts.com/school/doku.php?id=chart_school:trading_strategies:percent_above_moving

I have also attached the algorithm I want to apply this concept to.

Regards,

Amin

ability to get 50% of the securities within the ETF

Ah, then this isn't possible to screen automatically within the IDE. If you already know the ETF's constituents, you can hard-code them in your algo using the sid() function.

Alisa, how would this work for backtesting? Does quantopian have historical constituent data for etfs/indexes for a backtest?

This approach would not work historically over time since the ETF constituent data is not yet on Quantopian. We've been looking to integrate it but it is not currently available.

Any updates on ETF constituent data?