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| Can't add indicator to my strategy PercentBollingerBands |
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Illya
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| Post subject: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 0
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Posted: Thu 14 Jul, 2016, 15:13
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User rating: 6
Joined: Wed 05 Mar, 2014, 12:00
Posts: 116
Location: Ukraine, Odessa
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Hi there! Started use IDE for strategy create. I want to add a PercentBollingerBands indicator to use in my strategy code but can't find it in the Indicators LIST , Only a BBands indicator.  Please advice
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API Support
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| Post subject: Re: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 0
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Posted: Mon 25 Jul, 2016, 08:23
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User rating: ∞
Joined: Fri 31 Aug, 2007, 09:17
Posts: 6139
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Here is code that calculates PERSBBANDS. IFeedDescriptor fd = new TimePeriodAggregationFeedDescriptor(Instrument.EURUSD, Period.TEN_MINS, OfferSide.BID);
Object[] indicatorResult = indicators.calculateIndicator(fd, new OfferSide[] {OfferSide.BID}, "PERSBBANDS", new IIndicators.AppliedPrice[] {IIndicators.AppliedPrice.CLOSE}, new Object[] {20, 2.0}, 1);
console.getOut().println(indicatorResult[0]);
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Illya
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| Post subject: Re: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 0
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Posted: Mon 25 Jul, 2016, 13:29
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User rating: 6
Joined: Wed 05 Mar, 2014, 12:00
Posts: 116
Location: Ukraine, Odessa
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Illya
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| Post subject: Re: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 0
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Posted: Tue 26 Jul, 2016, 12:13
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User rating: 6
Joined: Wed 05 Mar, 2014, 12:00
Posts: 116
Location: Ukraine, Odessa
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Hello again. I added your code to my strategy and tried to adjust filter in it public IFeedDescriptor fd = new TimePeriodAggregationFeedDescriptor(instr, per, OfferSide.BID, Filter.ALL_FLATS);
Object[] indicatorResult = indicators.calculateIndicator(fd, new OfferSide[] {OfferSide.BID}, "PERSBBANDS", new IIndicators.AppliedPrice[] {IIndicators.AppliedPrice.CLOSE}, new Object[] {40, 1.8}, 1);
console.getOut().println(indicatorResult[0]); But it takes into consideration weekend prices and shows me a bad values of indicator.  Any suggestions?
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API Support
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| Post subject: Re: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 1
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Posted: Tue 16 Aug, 2016, 09:08
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User rating: ∞
Joined: Fri 31 Aug, 2007, 09:17
Posts: 6139
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Hello.
This universal function for indicator calculation by shift doesn't use filter set in feedDescriptor and no filtration is applied during calculation.
See JavaDoc for IIndicators.calculateIndicator(IFeedDescriptor feedDescriptor, OfferSide[] offerSides, String functionName, AppliedPrice[] inputTypes, Object[] optParams, int shift)
But you can use another function - for indicator calculation by candle interval:
public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) throws JFException {
if (!instrument.equals(Instrument.EURUSD) || !period.equals(Period.ONE_HOUR)) {
return;
}
IFeedDescriptor fd = new TimePeriodAggregationFeedDescriptor(Instrument.EURUSD, Period.ONE_HOUR, OfferSide.BID, Filter.ALL_FLATS);
Object[] indicatorResult = indicators.calculateIndicator(fd, new OfferSide[] {OfferSide.BID}, "PERSBBANDS",
new IIndicators.AppliedPrice[] {IIndicators.AppliedPrice.CLOSE}, new Object[] {40, 1.8}, 1, bidBar.getTime(), 0);
console.getOut().println(((double[]) indicatorResult[0])[0]);
}
Kind regards, Support Team.
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Illya
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| Post subject: Re: Can't add indicator to my strategy PercentBollingerBands |
Post rating: 0
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Posted: Mon 05 Sep, 2016, 12:30
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User rating: 6
Joined: Wed 05 Mar, 2014, 12:00
Posts: 116
Location: Ukraine, Odessa
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Thanks for solution and best regards! 
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