How to get RSI value at previous candle's closing

 
Hi I am new to MQL5 and I couldnt figure out how to get the RSI value at previous candle's closing. How can I do that?
 

Documentation on MQL5: Technical Indicators / iRSI

Code Base

RSI EA v2

Vladimir Karputov, 2019.01.02 14:31

RSI EA - trading based on overbought/oversold zones determined by the iRSI (Relative Strength Index, RSI) indicator.

Documentation on MQL5: Technical Indicators / iRSI
Documentation on MQL5: Technical Indicators / iRSI
  • www.mql5.com
iRSI - Technical Indicators - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5