double[] rsi14askResults = indicators.rsi(Instrument.EURUSD, Period.ONE_HOUR, OfferSide.ASK, AppliedPrice.CLOSE, 14, Filter.NO_FILTER, 30, time, 0);

the return values are not closed to right rsi values, which I can find in jforex platform.

another important question is I see the rsi values in jforex platform maybe a half of the ask price add bid price, but in the indicators.rsi method, I must give one offerside, can I set the offerside in jforex platform? or get the same a half of the ask price add bid price from the strategy.

RSI indicator is recursive and requires more values to be calculated. Only then will the outputs exactly match chart values.

public void onStart(IContext context) throws JFException {
   this.console = context.getConsole();
   this.history = context.getHistory();
   this.indicators = context.getIndicators();

   Instrument instrument = Instrument.EURUSD;
   Period period = Period.ONE_HOUR;
   long time = history.getLastTick(instrument).getTime();
   time = history.getBarStart(period, time);
   int len = 4000;
   double[] rsiOut = indicators.rsi(instrument, Period.ONE_HOUR, OfferSide.ASK, AppliedPrice.CLOSE, 14, Filter.NO_FILTER, len, time, 0);
   
   console.getOut().println(arrToString(rsiOut, len - 3, instrument));
}

private String arrToString(double[] arr, int from, Instrument instrument) {
   StringBuffer sb = new StringBuffer();
   for (int r = from; r < arr.length; r++) {
      sb.append(String.format("[%s] %." + (instrument.getPipScale() + 1) + "f; ", r, arr[r]));
   }
   return sb.toString();
}

Oh. it's too bad, so you should rewrite the method for rsi with using parameter 'shift', it can not get right so far.