Hello support,

I want to use in my strategy custom time period bar (3 minutes). I can take bars from history, but I don’t receive actual bars (I make subscription) in historical tester and from live data too. I made some checking strategy - it is as an attachment.

What is wrong?

Thanks for help.

IStrategy.onBar() method is called only on bars for basic periods.
To handle notifications on bars for custom period one should implement IBarFeedListener interface and place his code to IBarFeedListener.onBar() method.

...
public class AAcheckCustomTimeBarFeed implements IStrategy, IBarFeedListener {
...
    @Override
    public void onStart( IContext context ) throws JFException {
...
        context.subscribeToBarsFeed(
                Instrument.EURUSD,
                CustomPeriod,
                OfferSide.ASK,
                this
                );
        context.subscribeToBarsFeed(
                Instrument.EURUSD,
                CustomPeriod,
                OfferSide.BID,
                this
                );
    }

    @Override
    public void onBar( Instrument instrument, Period period,
            OfferSide offerSide, IBar bar ) {
        // place your code here
    }
...
}

Also please see the wiki https://www.dukascopy.com/wiki/#Chart_f ... _to_a_feed

Hello support,

I made changes (mainly "implements IBarFeedListener" ). Method onBar I had OK. But I still don't have actual custom bars.

Wiki (in link) doesn't include any mention about IBarFeedListener.

What is wrong?

Thans for help.

That is because IBarFeedListener that is passed into subscribe method is empty. The object that is passed into the subscribe method should have event processing code.

context.subscribeToBarsFeed(
                Instrument.EURUSD,
                Period.TEN_SECS,
                OfferSide.ASK,
                  new IBarFeedListener() {
                    public void onBar( Instrument instrument, Period period,
                            OfferSide offerSide, IBar bar ) {
                                // add code here
                                console.getOut().println("print");
                            }
                }
                );

Support, thanks for advise. In "subscribeToBarsFeed" is "this" for me better. I miss it in previous advise.

Feed bars give separately Ask and Bid bars. I make some small improvement to get feed bars in standard onBar method - in attachment. Next feed bars processing could be the same as a standard bars processing.

I made simple code for multiple bar feed.