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How can I get the moving averages of 200 days before my algo begins?

I want to buy on margin based on moving averages and short on cash, but my moving averages do not start until the algorithm starts. how could I solve that?

Thanks in advance

2 responses

You can use the history function to pull previous prices and then take the average.

Using your variables, here is the syntax:

# get a trailing window of data  
prices = history(200, '1d', 'price')

# take the moving average  
xlong = prices.mean()

# index into the pandas dataframe to get the most recent X prices and take the average  
long = prices[:50].mean()  
mid = prices[:18].mean()  
short = prices[:3].mean()  
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Thank you VEEEEEEERRRRRYYYYYY MUCH!!!!