Everytime I subscribe to a certain instrument in my strategy (using the ICLIENT interface), an additional instrument (one which I dont want to subscribe to) also gets subscribed. For example, I subscribe to the instrument using the code below:

........
client.startStrategy(new ExpStrat());
Set<Instrument> instruments = new HashSet<Instrument>();
instruments.add(Instrument.GBPNZD);
client.setSubscribedInstruments(instruments);
........

In the strategy, I print the instruments that are visible using the code below:
..........
public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) {
if (period == Period.TEN_SECS){
System.out.println(instrument + " Close " + askBar.getClose() + " at " + DateMan.longToString_ss(askBar.getTime()));
}
}
..........

The output I get when the strategy runs is:
NZD/USD Close 0.82803 at 04-Jul-2011 16:24:10
GBP/NZD Close 1.94111 at 04-Jul-2011 16:24:10
NZD/USD Close 0.82804 at 04-Jul-2011 16:24:20
GBP/NZD Close 1.94111 at 04-Jul-2011 16:24:20
NZD/USD Close 0.82804 at 04-Jul-2011 16:24:30
GBP/NZD Close 1.9411 at 04-Jul-2011 16:24:30

I am not sure where the instrument "NZD/USD" came from. I am getting the same result from both API 2.6.38 and API 2.6.42.

Is this expected behavior.

Would like to add to this case: when I subscribe to EURUSD, GBPUSD and EURCHF in onBar method I'm also getting USDCHF data !

However with the very same code when I subscribe only to EURUSD no addtional pairs show up in onBar calls.

I'm running Java code from Eclipse or as standalone .jar.

And later today (since around 21h CET) I was only able to get USDCHF in onBar calls despite not being subscribed to it at all ???!!

Btw it's a demo account.

Yes, it is normal behaviour, because if your account currency is USD, then obviously P/L is displayed in USD. So in order to calculate your P/L NZD/USD is subscribed.

Ah. That explains it. Thanks for the reply. I will use some kind a filter within the strategy to consider only the pairs I want.

See the suggested practice for this purpose:
https://www.dukascopy.com/wiki/index.php ... Ticks/Bars