Dear Support,

I created the attached TestIndicator.java to reproduce the problem I'm facing using the sample code provided by Dukascopy API.
TestStrategy.java is a sample strategy that calculates the indicator and also add the indicator on a chart.
TestStrategyRunWithGUI.java is a modified version of singlejartest.TesterMainGUIMode sample from the API, this is to historically test the strategy

When the indicator is invoked from the TestIndicator.onBar(...) methods to calculate, context.getFeedDescriptor() is properly initialised and return all the necessary values;
When the indicator in invoked by the chart to calculate, context.getFeedDescriptor() is null
Please see the attached Error.txt

Am I missing a step when adding the indicator on the chart or is this a bug in the API?

Thanks,
Regards,

Serge.

Any help?

When an indicator is instantiated by indicators.getIndicator("TestIndicator") there is no way to know where this indicator is going to be used and what the FeedDescriptor will be.
One workaround could be to set feedDescriptor into the indicator manually through a custom method like so:

indicators.registerCustomIndicator(TestIndicator.class);
TestIndicator testIndicator = indicators.getIndicator("TestIndicator");
chart=context.getLastActiveChart();
testIndicator.setFeed(chart.getFeedDescriptor());