// add RSI to Values enum
public enum Values { RSI }
// calc rsi and get latest value
Double rsi = <get from your rsi calc code>
// place value into new RSI data series
series.setDouble(index, Values.RSI, rsi);
// create SMA from RSI data series
double SMAofRSI = series.sma(index, sma_period, Values.RSI);
@Pejman I would like to know how to do it programmatically.