Hello I have problem with using my custom indicator "LS_I_DirectionalCorrelation_vs_GBPUSD" in my strategy.
Let me explain more details..

I have my custom indicator with name "LS_I_DirectionalCorrelation_vs_GBPUSD".
This indicator is calculating correlation index between by-user-chosen instrument and GBPUSD instrument.
Here is source code of the indicator if you are interested: https://files.lorencsoftware.cz/20000007 ... BPUSD.java

The indicator is working fine, I have no problems with the indicator.
I tried to calculete the indicator values from strategy code.
Like this:

            Object[] vals = context.getIndicators().calculateIndicator(
                    Instrument.EURUSD,
                    Period.createCustomPeriod(Unit.Minute, 60),
                    new OfferSide[] {OfferSide.BID, OfferSide.BID},
                    "LS_I_DirectionalCorrelation_vs_GBPUSD",
                    new AppliedPrice[] {AppliedPrice.CLOSE, AppliedPrice.CLOSE},
                    new Object[] {14},
                    1);
            context.getConsole().getOut().println(vals[0].toString());

This works fine, there is no problem.
Result looks like for example this: 0.706331927573264 ..is instance of Double
everythink is ok.


But after that I realized the code is taking data from weekend also.
And I want to exclude the weekend bars from calculation.
I want the correlation index is calculated from bars of week, and weekends have to be skiped.

So I have decided to use this implementation of calculateIndicator method...

Object[] calculateIndicator(Instrument instrument,
                            Period period,
                            OfferSide[] side,
                            String functionName,
                            IIndicators.AppliedPrice[] inputTypes,
                            Object[] optParams,
                            long from,
                            long to)
                            throws JFException

So in my case it looks like this:

            Object[] values = context.getIndicators().calculateIndicator(
                    Instrument.EURUSD,
                    Period.createCustomPeriod(Unit.Minute, 60),
                    new OfferSide[] {OfferSide.BID, OfferSide.BID},
                    "LS_I_DirectionalCorrelation_vs_GBPUSD",
                    new AppliedPrice[] {AppliedPrice.CLOSE, AppliedPrice.CLOSE},
                    new Object[] {14},
                    Filter.WEEKENDS,
                    1,
                    askBar.getTime(),
                    0);
            context.getConsole().getOut().println(values[0].toString());

The compilation of this code is OK, and it runs without exceptions.
But here is finally my problem:
I dont know what is the type of the Object instances inside Object[] result of the calculation... ?
Is array of objects? Or is array of arrays of objects? Or what??

when you will try to invoke .toString() method on the instance of Object from Object[] array - result of the calculation
You will see somthing like this: [D@db6096

As you know, in Java the toString() (if its not overwritten) method is defined like getClass().getName() + '@' + Integer.toHexString(hashCode())
see https://www.ifs.tuwien.ac.at/ifs/lehre/e ... #toString()

So what is the class type of the result ???
I can not work with the result because I can not recognize the class.

I am waiting for your response,
thak you for assistance.
Best regards
Marek Lorenc

Returned array is Object[numberOfOutputs][elements of output type]
For example this code should work:
for (int i = 0; i < numberOfOutputs; i++) {
double[] output = (double[]) indicatorResult[i];
}

You have only one outputs, so this code can be simplified
double[] output = (double[]) indicatorResult[0];

Hello
unfortunately your sugestion is not working..

I tried following:

    public double correlate2(long bidTime) throws JFException {
        Double[] values = (Double[]) context.getIndicators().calculateIndicator(
                Instrument.EURUSD,
                Period.createCustomPeriod(Unit.Minute, 60),
                new OfferSide[] {OfferSide.BID, OfferSide.BID},
                "LS_I_DirectionalCorrelation_vs_GBPUSD",
                new AppliedPrice[] {AppliedPrice.CLOSE, AppliedPrice.CLOSE},
                new Object[] {14},
                Filter.WEEKENDS,
                1,
                bidTime,
                0)[0];

        Double d = values[0];

        return d;
    }

And the result is this exception:
18:20:01 Strategy tester: java.lang.ClassCastException: [D cannot be cast to [Ljava.lang.Double; @ jforex.LS_S_Test.correlate2(LS_S_Test.java:75)

You can't cast double[] to Double[] like that. Try using double and double[], all lower case, instead.