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WaddahAT value on chart different than in strategy
tcsabina
 Post subject: WaddahAT value on chart different than in strategy Post rating: 0   New post Posted: Wed 31 Aug, 2016, 21:53 
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Joined: Mon 08 Oct, 2012, 10:35
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Dear Support,

I see differences between the value of the WaddahAT indicator on the chart and in a strategy.
Could you explain, what is going on?

I attach a strategy to show my indicator calling/calculation.

Screenshot showing the difference:
Image


Attachments:
File comment: screenshot showing the difference
Capture.PNG [59.59 KiB]
Downloaded 216 times
File comment: sample strategy to calculate the indicator
IndicatorValueRenko4.java [1.9 KiB]
Downloaded 105 times
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API Support
 Post subject: Re: WaddahAT value on chart different than in strategy Post rating: 0   New post Posted: Thu 01 Sep, 2016, 14:36 
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Joined: Fri 31 Aug, 2007, 09:17
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This indicator requires more values if it needs to match the chart. This happens because it is inductive (next values are calculated based on previous values).
To test the indicator please open the required chart, add the indicator and run the attached strategy. It is visible that chart values match "API + extra inputs".


Attachments:
IndChartVsApi.java [16.31 KiB]
Downloaded 87 times
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tcsabina
 Post subject: Re: WaddahAT value on chart different than in strategy Post rating: 0   New post Posted: Wed 07 Sep, 2016, 18:30 
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User rating: 164
Joined: Mon 08 Oct, 2012, 10:35
Posts: 676
Location: NetherlandsNetherlands
Dear Support,

Could you assist me to modified the strategy that I attached in the first post?
I know it is about the following line, where the indicator is being called:
Object[] WaddahATFeed = indicators.calculateIndicator(feedDescriptor, new OfferSide[] { feedDescriptor.getOfferSide() }, "WaddahAT", null, null, 1);


But I am not able to figure it out, how to change it to the variant you have used:
Object[] extraOutputsFull = indicators.calculateIndicator(feedDescriptor, id.offerSides, id.indicatorName, id.appliedPrices, inputParams,
                    extraSize + dataCount, id.feedData.getTime(), 0);


I need to know the value of the WaddahAT indicator of the just finished bar, whenver a new Renko bar is created.


Thanks in advance.
 
API Support
 Post subject: Re: WaddahAT value on chart different than in strategy Post rating: 0   New post Posted: Thu 08 Sep, 2016, 10:11 
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Joined: Fri 31 Aug, 2007, 09:17
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In this forum we try to focus on JForex API issues. There are a number of external programmers who can program the strategy for you:
https://www.dukascopy.com/fxcomm/member ... am_service
 
tcsabina
 Post subject: Re: WaddahAT value on chart different than in strategy Post rating: 0   New post Posted: Sun 11 Sep, 2016, 13:21 
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User rating: 164
Joined: Mon 08 Oct, 2012, 10:35
Posts: 676
Location: NetherlandsNetherlands
Hmm, not really the answer I've expected on a support forum...

But anyway, I've managed to figure it out. In case someone needs it, here is the code:
            Object[] WaddahATFeed = indicators.calculateIndicator(feedDescriptor, new OfferSide[] { feedDescriptor.getOfferSide() }, "WaddahAT",
                                    new AppliedPrice[]{AppliedPrice.CLOSE}, new Object[] {}, 1000, feedData.getTime(), 0);
            double[] WaddahATvalue = (double[])WaddahATFeed[0];
            double WaddahAT        = WaddahATvalue[999];
 
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