title: create Aroon Indicator in Python
body: <p>I want to add aroon (bullish and bearish) indicator column to the data frame of stock price OHLCV. Aroon calculation is <a href="https://www.investopedia.com/ask/answers/112814/what-aroon-indicator-formula-and-how-indicator-calculated.asp" rel="nofollow noreferrer">here</a> </p>