As the topic title describes, there is some issue with extending the user interface. currently. The wiki example (https://www.dukascopy.com/wiki/#Extendin ... ck_counter) generates this exception when I try to run in in the Historical Tester.
There has never been such a feature of making user interface available from the Historical Tester, it just was not documented. We will have a look if there are not any side effects for implementing this. Till then consider plotting your visual panels on standalone frames when running a strategy from the Historical Tester.
tcsabina
Post subject: Re: java.lang.NullPointerException @ jforex.guitests.TickCountingTabSimple.onStart(TickCountingTab