(1) real time candlestick Chart with lines and points together (2) show at least two candlesticks together

[yezhengli-Mr9]

I can provide my sample source code if necessary in the near future.
(1) Try to draw real-time candlestick Chart with lines and points together. By lines and points, I mean for example, combination of vertical and horizontal lines to show support point and alert trigger point.
(1a) no need to show arrow; lines are good.
(2a) even rectangles instead of combination of horizontal and vertical lines are OK.
(2) better show at least two candlesticks together -- so far any way is fine: for example,
(2a) side by side
(2b) put two candlesticks on one chart.

Try to use addPaintAfterEp(...), setPaintBarMarker(...) in following potentially helpful examples while following samples provide blank or non-instructive output charts?

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialPositionSample.java

Line 45 in ed86318

candleStickRenderer.addPaintAfterEp(new PositionFinancialRendererPaintAfterEP(

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialRealtimeFootprintSample.java

Line 58 in ed86318

renderer.addPaintAfterEp(new AbsorptionClusterRendererPaintAfterEP(ohlcvDataSet, chart));

On the other hand, addPaintAfterEp(...) in following can provide Color.MAGENTA as designed

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/financial/FinancialRealtimeCandlestickSample.java

Line 117 in ed86318

((RendererPaintAfterEPAware) renderer).addPaintAfterEp(new PositionFinancialRendererPaintAfterEP(positionFinancialDataSet, (XYChart) chart));

[yezhengli-Mr9]

Relevant issue is posted #643

[yezhengli-Mr9]

To accomplish this goal, I was able to conduct substantial modification on several classes relevant to

chart-fx/chartfx-dataset/src/main/java/io/fair_acc/dataset/spi/financial/OhlcvDataSet.java

Line 19 in ed86318

public class OhlcvDataSet extends AbstractDataSet<OhlcvDataSet> implements Iterable<IOhlcvItem>, IOhlcvItemAware, AttributeModelAware {

which seems enough to resolve issue (1) and hopefully can resolve (2) as well in the near future

real time update mechanism for the chart

(1) now try to figure out real time update mechanism for the chart suitable for

chart-fx/chartfx-chart/src/main/java/io/fair_acc/chartfx/renderer/spi/financial/CandleStickRenderer.java

Line 105 in ed86318

protected void render(GraphicsContext gc, DataSet ds, DataSetNode styleNode) {

(1) real time candlestick Chart with lines and points together

for example,
(1a) incremental update?
(1b) need to integrate with real-time streaming data.
(2) Do not feel these financial examples are (updated) real time since they do not update the similar to

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/chart/Histogram2DimSample.java

Lines 138 to 144 in ed86318

	timer.scheduleAtFixedRate(new TimerTask() {
	@Override
	public void run() {
	fillData();
	chart.invalidate();
	}
	}, Histogram2DimSample.UPDATE_DELAY, Histogram2DimSample.UPDATE_PERIOD);

likely because these "real-time" financial examples are not handling streaming(-like) data but calling loadTestData(...) instead

chart-fx/chartfx-samples/src/main/java/io/fair_acc/sample/financial/AbstractBasicFinancialApplication.java

Lines 207 to 215 in ed86318

	} else {
	ohlcvDataSet = new OhlcvDataSet(resource);
	indiSet = new DefaultDataSet("MA(24)");
	try {
	loadTestData(resource, ohlcvDataSet, indiSet);
	} catch (IOException e) {
	throw new IllegalArgumentException(e.getMessage(), e);
	}
	}

Need real-time update of daily minute-level financial charts.

[yezhengli-Mr9]

To break into two (or more) smaller discussions.