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CandleStick chart limitation

Posted on 2011-03-11
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Last Modified: 2012-06-27
Please advise how to limit length of CandleStick chart up to maximum10 minutes
public EURUSD_CandleStick_Market() {

        datesArrayList = new ArrayList();
        pricesArrayList = new ArrayList();

        interval = 60000L;
        af = new ApplicationFrame("Chart Market");
        csr = new CandlestickRenderer();

    }

    public void aflagc(boolean flag0c) {
        mflag0c = flag0c;
    }

    public void dsControl(boolean ds0) {
        mds = ds0;
    }

    public void eurusd_CandleStick_Market(double[] avg,
                                          java.util.Date[] avg_ts) {

        if (avg[0] != 0 && mds == true) {
            System.out.println("EUR/USD Market avg[0]    = " + avg[0]);
            System.out.println("EUR/USD Market avg_ts[0]    = " + avg_ts[0]);
            System.out.println("EUR/USD Market mds    = " + mds);
            System.out.println("EUR/USD Market mflag0c    = " + mflag0c);

            datesArrayList.add(avg_ts[0]);
            pricesArrayList.add(new Double(avg[0]));

            java.util.Date[] myDates =
                new java.util.Date[datesArrayList.size()];

            for (int j = 0; j < myDates.length; j++) {
                myDates[j] = (java.util.Date)datesArrayList.get(j);
            }

            double[] myPrices = new double[pricesArrayList.size()];
            for (int j = 0; j < myPrices.length; j++) {
                myPrices[j] = ((Double)pricesArrayList.get(j)).doubleValue();
            }

            //            System.out.println("Dates: ");
            for (int j = 0; j < myDates.length; j++) {
                //                System.out.println(myDates[j].toString());
            }
            //            System.out.println("Prices: ");

            for (int j = 0; j < myPrices.length; j++) {
                //                System.out.println(myPrices[j]);
            }
            System.out.println("interval: " + interval);

            DefaultHighLowDataset dataset =
                OHLCData(myDates, myPrices, myDates[0], interval);


            JFreeChart chart = createChart(dataset);
            ChartPanel chartPanel = new ChartPanel(chart);

            af.setContentPane(chartPanel);
            af.setSize(800, 500);
            af.setLocation(1600, 800);
            if (mflag0c == true) {
                af.setVisible(true);
                chartPanel.repaint();
            } else {
                af.setVisible(false);
            }
        }
    }

    public DefaultHighLowDataset OHLCData(java.util.Date[] dates,
                                          double[] prices,
                                          java.util.Date startDate,
                                          long interval) {
        java.util.Date[] finalDates;
        double[] highs;
        double[] opens;
        double[] closes;
        double[] lows;
        double[] volumes;

        ArrayList anchors = new ArrayList();
        HashMap h = new HashMap();

        long start = startDate.getTime();

        for (int j = 0; j < dates.length; j++) {
            long cur = dates[j].getTime();
            long num = ((cur - start) / interval);
            Long anchor = new Long(start + num * interval + interval / 2);
            if (h.get(anchor) == null) {
                Moment mm = new Moment(dates[j], prices[j]);
                h.put(anchor, mm);
                anchors.add(anchor);
            } else {
                Moment mm = (Moment)h.get(anchor);
                mm.update(dates[j], prices[j]);
                h.put(anchor, mm);
            }
        }

        Collections.sort(anchors);

        finalDates = new java.util.Date[anchors.size()];
        opens = new double[anchors.size()];
        highs = new double[anchors.size()];
        lows = new double[anchors.size()];
        closes = new double[anchors.size()];
        volumes = new double[anchors.size()];

        for (int j = 0; j < anchors.size(); j++) {
            Long ttime = (Long)anchors.get(j);
            Moment mm = (Moment)h.get(ttime);
            finalDates[j] = new java.util.Date(ttime.longValue());
            opens[j] = mm.getOpen();
            closes[j] = mm.getClose();
            highs[j] = mm.getHigh();
            lows[j] = mm.getLow();
            volumes[j] = 0.0;
        }

        DefaultHighLowDataset dataset =
            new DefaultHighLowDataset("Series 1", finalDates, highs, lows,
                                      opens, closes, volumes);
        return dataset;
    }

    private JFreeChart createChart(final DefaultHighLowDataset dataset) {
        final JFreeChart chart =
            ChartFactory.createCandlestickChart("Candlestick EUR/USD Market",
                                                "Time", "Price", dataset,
                                                false);

        NumberAxis yaxis = (NumberAxis)chart.getXYPlot().getRangeAxis();
        yaxis.setAutoRangeIncludesZero(false);

        csr.setCandleWidth(10);
        chart.getXYPlot().setRenderer(csr);

        return chart;
    }

}

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Question by:gbcbr
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5 Comments
 
LVL 47

Expert Comment

by:for_yan
ID: 35110964
About that you already know my suggestion.
I think it would be the  quickest way just to follow it.
0
 

Author Comment

by:gbcbr
ID: 35110973
Can you please insert your suggestion in this code?
0
 
LVL 47

Accepted Solution

by:
for_yan earned 2000 total points
ID: 35111051

You just replace lines 32-42 in the above with the following code:


ArrayList datesArrayList1 = new ArrayList();
ArrayList pricesArrayList1 = new ArrayList();
for (int j=0; j< datesArrayList.size(); j++){
java.util.Date dd = (java.util.Date) datesArrayList.get(j);
Double dpr = (Double) priceArrayList.get(j);
if ((dd.getTime() - avg_ts[0].getTime())<-1000000L) continue;
datesArrayList1.add(dd);
pricesArrayList1.add(dpr);
}

          java.util.Date[] myDates =
                new java.util.Date[datesArrayList1.size()];

            for (int j = 0; j < myDates.length; j++) {
                myDates[j] = (java.util.Date)datesArrayList1.get(j);
            }

            double[] myPrices = new double[pricesArrayList1.size()];
            for (int j = 0; j < myPrices.length; j++) {
                myPrices[j] = ((Double)pricesArrayList1.get(j)).doubleValue();
            }



0
 

Author Comment

by:gbcbr
ID: 35111209
Thank you, works very well, I put 12000 only and it keeps only two candles all the time.
0
 
LVL 47

Expert Comment

by:for_yan
ID: 35111222
Great!
0

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