Python-for-Data-Science

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Bollinger Band code needs some minor rework

1

Inside Bollinger Bands Tutorial.py, there's some minor rework required. item[’30 Day STD’] = item[‘Adj Close’].rolling(window=20).std() should become item[’30 Day STD’] = item[‘Adj Close’].rolling(window=20).std(ddof=0) (this is because the standard deviation is...

RichardDale