Hello, sometimes it happens that IHistory::getBar() / getBars() Function returns null, like you described in Wiki: "If there is no bar loaded at that position, then function returns null."

Its a little bit confusing since i can already see this bar on the chart but when i try to accsess it via getBar() the Function returns null anyway.

How can i force JForex to load this bar?

Please provide an example strategy that replicates the issue.

Ok, first of all this Problem happens only in Live-Mode(Demo-Acc) in the HistoricalTester everything went well.

It seems like the Problem occurres only if i want to access the Bar thats currently forming (Shift: 0) on an M5 and/or M15 Chart,
on higher Timeframes such as H4, D1 & W1 it works just fine.


attached Example-Strategy:

-In the onStart() Function i load the last 200 Bars (including currently forming Bar) for each of my used Periods.
Bars get loaded fine except for M5 Period.

-current Bar loading in onTick()-Function fails on M5 & on M15 Timeframe, the higher Timeframes work just fine.
If I open a Chart and select Period M15 in it, the M15-Bar loading in onTick() works just fine too.. (same with M5)


Do i have to open a Chart window for each and every Timeframe i want to load current Bar for?

Hello,

I think that I found 2 bugs in the latest version of JForex (Historical tester).

Test code:

public void onBar(Instrument instrument, Period period, IBar askbar,
            IBar bidbar) throws JFException {
                 IBar prevBarAsk1 = history.getBar(instrument, period,
                        OfferSide.ASK, 2);
}

It throws exception:

Strategy tester: com.dukascopy.api.JFException: Could not load bar for instrument [EUR/USD], period [Hourly], side [Ask], start time [2011.03.01 08:00:00 000], current bar start time [2011.03.01 10:00:00 000]

The other problem is indicator values with Filter.ALL_FLATS

private final Filter indFilter = Filter.ALL_FLATS;

    public static String arrayToString(double [][] arr){
      String str = "";
      for (int r=0; r<arr.length; r++) {
          for (int c=0; c<arr[r].length; c++) {
             str += " " + (new DecimalFormat("0.000000")).format(arr[r][c]);
          }
          str += "; ";
      }
      return str;
   }

    void printMsg(String text)
    {
        console.getOut().println(text);
    }


public void onBar(Instrument instrument, Period period, IBar askbar,
            IBar bidbar) throws JFException {

                double macdNoFlat[][] = indicators.macd(instrument,period,OfferSide.BID,AppliedPrice.CLOSE,12,26,9,indFilter,0,askbar.getTime(),4);
                printMsg(arrayToString(macdNoFlat));

}

I'm testing this code on EUR/USD, Last year. Values of macd in array are not equal to indicator on chart and values can change at next bar:

2012-03-31 15:08:43   0.000708 0.000635 0.000696 0.000649;  0.000843 0.000802 0.000780 0.000754;  -0.000135 -0.000167 -0.000085 -0.000106;
2012-03-31 15:08:43   0.000790 0.000708 0.000635 0.000703;  0.000877 0.000843 0.000802 0.000782;  -0.000087 -0.000135 -0.000167 -0.000079;
2012-03-31 15:06:28   0.000852 0.000790 0.000708 0.000626;  0.000899 0.000877 0.000843 0.000800;  -0.000047 -0.000087 -0.000135 -0.000174;
2012-03-31 15:06:27   0.000855 0.000852 0.000790 0.000708;  0.000911 0.000899 0.000877 0.000843;  -0.000055 -0.000047 -0.000087 -0.000135;
2012-03-31 15:06:27   0.000971 0.000855 0.000852 0.000788;  0.000924 0.000911 0.000899 0.000877;  0.000047 -0.000055 -0.000047 -0.000089;
2012-03-31 15:06:27   0.000886 0.000971 0.000855 0.000854;  0.000913 0.000924 0.000911 0.000899;  -0.000027 0.000047 -0.000055 -0.000045;
2012-03-31 15:06:27   0.000804 0.000886 0.000971 0.000851;  0.000920 0.000913 0.000924 0.000910;  -0.000116 -0.000027 0.000047 -0.000058;
2012-03-31 15:06:27   0.000806 0.000804 0.000886 0.000970;  0.000948 0.000920 0.000913 0.000924;  -0.000143 -0.000116 -0.000027 0.000046;

I've found this topic: viewtopic.php?f=65&t=36131&p=46827
I tried to reproduce it and no luck. Macd on chart is always differs from logged values no matter if filter all flats or not.