Hi,

i'm trying to call the ichimoku indicator from a custom indicator. What i want to do is extract the TenkanSen return value and display that in the Chart.

private IIndicator ichimoku;
private double[][][] inputs = new double[1][][];
private double[][] outputs = new double[1][];

...

inputParameterInfos = new InputParameterInfo[]{new InputParameterInfo("Price", InputParameterInfo.Type.PRICE)};

...

ichimoku = context.getIndicatorsProvider().getIndicator("ICHIMOKU");
ichimoku.setInputParameter(0,inputs[0]);
ichimoku.setOptInputParameter(0,9);
ichimoku.setOptInputParameter(1,26);
ichimoku.setOptInputParameter(2,52);

ichimoku.setOutputParameter(0,output[0]);

IndicatorResult ichi_result= ichimoku.calculate(startIndex, endIndex);


The ichi_result.getNumberOfElements() is empty.

1) What am i doing wrong here?
2) How can i specify the time period on which i want to calculate the ichimoku ts value from?
3) Is there an equivalent in jForex to the MQL iBarShift function? E.g. for #2 i want to calculate which M5 bar the current M1 bar some random m1 bar belongs to so that i can draw the M5 TenkanSen line on my M1 chart.

Thanks a lot for any help. It is very much appriciated.

Hi,

1) The function getNumberOfElements() returns nothing because you need to set output parameters for the Ichimoku indicator:

        ichimoku.setOutputParameter(0, new double[endIndex + 1]);
        ichimoku.setOutputParameter(1, new double[endIndex + 1]);
        ichimoku.setOutputParameter(2, new double[endIndex + 1]);
        ichimoku.setOutputParameter(3, new double[endIndex + 1]);
        ichimoku.setOutputParameter(4, new double[endIndex + 1]);
        ichimoku.setOutputParameter(5 , new Object[endIndex + 1]);

2) To add time period parameters to the form, please create a structure for the periods and add it to the OptInputParameterInfo array the as Period parameter:

        int[] periodValues = new int[10];
        String[] periodNames = new String[10];
        periodValues[0] = 0;
        periodNames[0] = Period.ONE_MIN.name();
        periodValues[1] = 1;
        periodNames[1] = Period.FIVE_MINS.name();
        periodValues[2] = 2;
        periodNames[2] = Period.TEN_MINS.name();
        periodValues[3] = 3;
        periodNames[3] = Period.FIFTEEN_MINS.name();
        periodValues[4] = 4;
        periodNames[4] = Period.THIRTY_MINS.name();
        periodValues[5] = 5;
        periodNames[5] = Period.ONE_HOUR.name();
        periodValues[6] = 6;
        periodNames[6] = Period.FOUR_HOURS.name();
        periodValues[7] = 7;
        periodNames[7] = Period.DAILY.name();
        periodValues[8] = 8;
        periodNames[8] = Period.WEEKLY.name();
        periodValues[9] = 9;
        periodNames[9] = Period.MONTHLY.name();

        optInputParameterInfos = new OptInputParameterInfo[] {new OptInputParameterInfo("Period", OptInputParameterInfo.Type.OTHER, new IntegerListDescription(7, periodValues, periodNames))};

3) You can use IHistory.getBars methods to get bars by the the specified period.

Thanks a lot. Two questions:

1) The ichimoku sources treats the first optinput parameter as the tenkan value. How does it work to just pass a period to it?
2) I though IHistory is not available in Indicators.

Thanks

1. If you want to pass period to the Ichimoku indicator from your custom indicator you should create an input parameter with a predefined Period:

        
        inputParameterInfos = new InputParameterInfo[] {
                        new InputParameterInfo("Input data", InputParameterInfo.Type.PRICE){{
                 setPeriod(Period.ONE_HOUR);
                };
        }};
        ichimoku.setInputParameter(0,inputs[0]);      

2. Yes, you are right, there is no way to access historical data from an indicator. For these purposes please use the IHistory interface methods in your strategy.