Dear Support!

Could you please share source for for fractal indicator using inside JForex platform?

Consider this https://www.dukascopy.com/swiss/english/forex/jforex/forum/viewtopic.php?f=6&t=8379

Hello!

Could you please explain how this implementations works? I confusing a bit because this indicator always returns 2 values (Max and Min) and I never got NaN. Not sure that it is possible to have UP and DOWN fractal in same time.
But on the chart arrows are correct.
Here is way how I calling indicator indicator:

        double []fr = indicators.fractal(
                Instrument.EURUSD,
                period,
                offerSide,
                0,
                2/*or 3 or 5 whatever*/
        );
        console.getOut().println("L: " + fr.length + " Max: " + fr[0] + " Min: " + fr[1]);

And here is a output:

05:08:40 L: 2 Max: 1.22025 Min: 1.22025
05:08:31 L: 2 Max: 1.22025 Min: 1.2202
05:08:20 L: 2 Max: 1.22025 Min: 1.2202
05:08:11 L: 2 Max: 1.22025 Min: 1.2202
05:08:01 L: 2 Max: 1.2203 Min: 1.22025
05:07:50 L: 2 Max: 1.2203 Min: 1.2203
05:07:41 L: 2 Max: 1.2203 Min: 1.2203
05:07:30 L: 2 Max: 1.22055 Min: 1.2203
05:07:21 L: 2 Max: 1.2205 Min: 1.2205
05:07:10 L: 2 Max: 1.2206 Min: 1.2205
05:07:01 L: 2 Max: 1.2206 Min: 1.2206
05:06:51 L: 2 Max: 1.2206 Min: 1.22055
05:06:40 L: 2 Max: 1.2207 Min: 1.22055
05:06:30 L: 2 Max: 1.2207 Min: 1.2207
05:06:20 L: 2 Max: 1.2207 Min: 1.2207

So question is how to interpret output of this indicator?
Really need your feedback about this question.

Thanks, for your attention. There is a bug. It will be fixed ASAP.

Could you please keep us updated?

Sorry for misunderstanding, the indicator is working properly. You need to give a timePeriod > 0. The parameter timePeriod determines candle count which will be used to calculate your indicator value. And shift parameters says, from which candle to start calculate the value.
This will calculate you a value starting from the previous(current-1) bar till the next one(current-2)

             double []fr = indicators.fractal(Instrument.EURUSD, period, OfferSide.BID, 1, 1);

But why sometimes indicator returns 2 values in same time?

in this current example, fractal looks at a previous and the next candle (in sum only 3 candles) to find its maximum and minimum. The fractal indicator compares lowest and highest prices of candles to calculate it's value. So for small candles in small timeperiod, a candle could have the maximum and the minimum at the same time quite often.