Calculate RSI indicator from pandas DataFrame?

Question

My problem

I tried many libraries on Github but all of them did not produce matching results for TradingView so I followed the fo

Answer 1

There is an easier way, the package talib.

import talib   
close = df['close']
rsi = talib.RSI(close, timeperiod=14)

If you'd like Bollinger Bands to go with your RSI that is easy too.

upperBB, middleBB, lowerBB = talib.BBANDS(close, timeperiod=20, nbdevup=2, nbdevdn=2, matype=0)

You can use Bollinger Bands on RSI instead of the fixed reference levels of 70 and 30.

upperBBrsi, MiddleBBrsi, lowerBBrsi = talib.BBANDS(rsi, timeperiod=50, nbdevup=2, nbdevdn=2, matype=0)

Finally, you can normalize RSI using the %b calcification.

normrsi = (rsi - lowerBBrsi) / (upperBBrsi - lowerBBrsi)

info on talib https://mrjbq7.github.io/ta-lib/

info on Bollinger Bands https://www.BollingerBands.com