It's not entirely clear to me how to apply the TA-Lib BBANDS function to a DataFrame obtained from the history() call.
Right now I have the following:
upper_band, _, lower_band = talib.BBANDS(
prices[sec], timeperiod = 10,
nbdevup = 2, nbdevdn = 2,
matype = 0) How would I go about applying the function to all of prices at once?
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