- "Show Cumulative RSI" will apply the RSI smoothing to the RSI.
- "Show EMA of RSI" simply applies an EMA to the RSI itself.
Normal 14-RSI I would suggest unchecking the box "Show Cumulative RSI".
The default settings are for the 2 Period RSI, with 3 Period SMA smoothing. The oversold level is 15, and overbought 85. Cheers.