Angular Multi-Pane Stock Charts using Sync Multi-Chart

1import {
2    SciChartVerticalGroup,
3    CategoryAxis,
4    EAxisAlignment,
5    SciChartSurface,
6    EAutoRange,
7    NumberRange,
8    NumericAxis,
9    OhlcDataSeries,
10    FastCandlestickRenderableSeries,
11    XyDataSeries,
12    calcAverageForArray,
13    FastLineRenderableSeries,
14    ZoomPanModifier,
15    ZoomExtentsModifier,
16    MouseWheelZoomModifier,
17    RolloverModifier,
18    FastBandRenderableSeries,
19    XyyDataSeries,
20    FastColumnRenderableSeries,
21    EXyDirection,
22    EFillPaletteMode,
23    EStrokePaletteMode,
24    IFillPaletteProvider,
25    IStrokePaletteProvider,
26    IRenderableSeries,
27    parseColorToUIntArgb,
28    ENumericFormat,
29    SmartDateLabelProvider,
30    XyMovingAverageFilter,
31    EDataSeriesField,
32    ELabelAlignment,
33    SeriesInfo,
34    EDataSeriesType,
35    OhlcSeriesInfo,
36    RolloverLegendSvgAnnotation,
37    SciChartOverview,
38    ESeriesType,
39    FastMountainRenderableSeries,
40    GradientParams,
41    Point,
42    TextAnnotation,
43    ECoordinateMode,
44    EHorizontalAnchorPoint,
45    EVerticalAnchorPoint,
46    EAnnotationLayer,
47} from "scichart";
48import { fetchMultiPaneData } from "../../../ExampleData/ExampleDataProvider";
49import { appTheme } from "../../../theme";
50
51const getTradingData = async (startPoints?: number, maxPoints?: number) => {
52    const { dateValues, openValues, highValues, lowValues, closeValues, volumeValues } = await fetchMultiPaneData();
53
54    if (maxPoints !== undefined) {
55        return {
56            dateValues: dateValues.slice(startPoints, startPoints + maxPoints),
57            openValues: openValues.slice(startPoints, startPoints + maxPoints),
58            highValues: highValues.slice(startPoints, startPoints + maxPoints),
59            lowValues: lowValues.slice(startPoints, startPoints + maxPoints),
60            closeValues: closeValues.slice(startPoints, startPoints + maxPoints),
61            volumeValues: volumeValues.slice(startPoints, startPoints + maxPoints),
62        };
63    }
64
65    return { dateValues, openValues, highValues, lowValues, closeValues, volumeValues };
66};
67
68// Override the standard legend displayed by RolloverModifier
69const getTooltipLegendTemplate = (seriesInfos: SeriesInfo[], svgAnnotation: RolloverLegendSvgAnnotation) => {
70    let outputSvgString = "";
71
72    // Foreach series there will be a seriesInfo supplied by SciChart. This contains info about the series under the house
73    seriesInfos.forEach((seriesInfo, index) => {
74        const y = 20 + index * 20;
75        const textColor = seriesInfo.stroke;
76        let legendText = seriesInfo.formattedYValue;
77        if (seriesInfo.dataSeriesType === EDataSeriesType.Ohlc) {
78            const o = seriesInfo as OhlcSeriesInfo;
79            legendText = `Open=${o.formattedOpenValue} High=${o.formattedHighValue} Low=${o.formattedLowValue} Close=${o.formattedCloseValue}`;
80        }
81        outputSvgString += `<text x="8" y="${y}" font-size="13" font-family="Verdana" fill="${textColor}">
82            ${seriesInfo.seriesName}: ${legendText}
83        </text>`;
84    });
85
86    return `<svg width="100%" height="100%">
87                ${outputSvgString}
88            </svg>`;
89};
90
91// Override the Renderableseries to display on the scichart overview
92const getOverviewSeries = (defaultSeries: IRenderableSeries) => {
93    if (defaultSeries.type === ESeriesType.CandlestickSeries) {
94        // Swap the default candlestick series on the overview chart for a mountain series. Same data
95        return new FastMountainRenderableSeries(defaultSeries.parentSurface.webAssemblyContext2D, {
96            dataSeries: defaultSeries.dataSeries,
97            fillLinearGradient: new GradientParams(new Point(0, 0), new Point(0, 1), [
98                { color: appTheme.VividSkyBlue + "77", offset: 0 },
99                { color: "Transparent", offset: 1 },
100            ]),
101            stroke: appTheme.VividSkyBlue,
102        });
103    }
104    // hide all other series
105    return undefined;
106};
107
108export const getChartsInitializationAPI = () => {
109    // We can group together charts using VerticalChartGroup type
110    const verticalGroup = new SciChartVerticalGroup();
111
112    const dataPromise = getTradingData();
113
114    let chart1XAxis: CategoryAxis;
115    let chart2XAxis: CategoryAxis;
116    let chart3XAxis: CategoryAxis;
117    const axisAlignment = EAxisAlignment.Right;
118
119    const upCol = appTheme.VividGreen;
120    const downCol = appTheme.MutedRed;
121    const opacity = "AA";
122
123    // CHART 1
124    const drawPriceChart = async (rootElement: string | HTMLDivElement) => {
125        const [chart, data] = await Promise.all([
126            SciChartSurface.create(rootElement, {
127                // prevent default size settings
128                disableAspect: true,
129                theme: appTheme.SciChartJsTheme,
130            }),
131            dataPromise,
132        ]);
133        const { wasmContext, sciChartSurface } = chart;
134        const { dateValues, openValues, highValues, lowValues, closeValues, volumeValues } = data;
135
136        chart1XAxis = new CategoryAxis(wasmContext, {
137            drawLabels: false,
138            drawMajorTickLines: false,
139            drawMinorTickLines: false,
140        });
141        sciChartSurface.xAxes.add(chart1XAxis);
142
143        const yAxis = new NumericAxis(wasmContext, {
144            maxAutoTicks: 5,
145            autoRange: EAutoRange.Always,
146            growBy: new NumberRange(0.3, 0.11),
147            labelFormat: ENumericFormat.Decimal,
148            labelPrecision: 4,
149            cursorLabelFormat: ENumericFormat.Decimal,
150            cursorLabelPrecision: 4,
151            labelPrefix: "$",
152            axisAlignment,
153        });
154        sciChartSurface.yAxes.add(yAxis);
155
156        // OHLC DATA SERIES
157        const usdDataSeries = new OhlcDataSeries(wasmContext, {
158            dataSeriesName: "EUR/USD",
159            xValues: dateValues,
160            openValues,
161            highValues,
162            lowValues,
163            closeValues,
164        });
165        const fcRendSeries = new FastCandlestickRenderableSeries(wasmContext, {
166            dataSeries: usdDataSeries,
167            stroke: appTheme.ForegroundColor, // Used for legend template
168            brushUp: upCol + "77",
169            brushDown: downCol + "77",
170            strokeUp: upCol,
171            strokeDown: downCol,
172        });
173        sciChartSurface.renderableSeries.add(fcRendSeries);
174
175        // MA1 SERIES
176        const maLowDataSeries = new XyMovingAverageFilter(usdDataSeries, {
177            dataSeriesName: "MA 50 Low",
178            length: 50,
179            field: EDataSeriesField.Low,
180        });
181        const maLowRenderableSeries = new FastLineRenderableSeries(wasmContext, {
182            dataSeries: maLowDataSeries,
183        });
184        sciChartSurface.renderableSeries.add(maLowRenderableSeries);
185        maLowRenderableSeries.rolloverModifierProps.tooltipColor = "red";
186        maLowRenderableSeries.rolloverModifierProps.markerColor = "red";
187        maLowRenderableSeries.stroke = appTheme.VividPink;
188        maLowRenderableSeries.strokeThickness = 2;
189
190        // MA2 SERIES
191        const maHighDataSeries = new XyMovingAverageFilter(usdDataSeries, {
192            dataSeriesName: "MA 200 High",
193            length: 200,
194            field: EDataSeriesField.High,
195        });
196        const maHighRenderableSeries = new FastLineRenderableSeries(wasmContext, {
197            dataSeries: maHighDataSeries,
198        });
199        sciChartSurface.renderableSeries.add(maHighRenderableSeries);
200        maHighRenderableSeries.stroke = appTheme.VividSkyBlue;
201        maHighRenderableSeries.strokeThickness = 2;
202
203        // VOLUME SERIES
204        const yAxis2 = new NumericAxis(wasmContext, {
205            id: "yAxis2",
206            isVisible: false,
207            autoRange: EAutoRange.Always,
208            growBy: new NumberRange(0, 3),
209        });
210        sciChartSurface.yAxes.add(yAxis2);
211
212        const volumeRenderableSeries = new FastColumnRenderableSeries(wasmContext, {
213            yAxisId: "yAxis2",
214            dataSeries: new XyDataSeries(wasmContext, {
215                dataSeriesName: "Volume",
216                xValues: dateValues,
217                yValues: volumeValues,
218            }),
219            dataPointWidth: 0.5,
220            strokeThickness: 1,
221            paletteProvider: new VolumePaletteProvider(usdDataSeries, upCol + opacity, downCol + opacity),
222        });
223        sciChartSurface.renderableSeries.add(volumeRenderableSeries);
224
225        // Add a watermark annotation
226        const watermarkAnnotation = new TextAnnotation({
227            x1: 0.5,
228            y1: 0.5,
229            xCoordinateMode: ECoordinateMode.Relative,
230            yCoordinateMode: ECoordinateMode.Relative,
231            horizontalAnchorPoint: EHorizontalAnchorPoint.Center,
232            verticalAnchorPoint: EVerticalAnchorPoint.Center,
233            opacity: 0.17,
234            textColor: appTheme.ForegroundColor,
235            fontSize: 48,
236            fontWeight: "Bold",
237            text: "Euro / U.S. Dollar - Daily",
238        });
239        sciChartSurface.annotations.add(watermarkAnnotation);
240
241        // MODIFIERS
242        sciChartSurface.chartModifiers.add(new ZoomPanModifier({ enableZoom: true }));
243        sciChartSurface.chartModifiers.add(new ZoomExtentsModifier());
244        sciChartSurface.chartModifiers.add(new MouseWheelZoomModifier());
245        sciChartSurface.chartModifiers.add(
246            new RolloverModifier({
247                modifierGroup: "cursorGroup",
248                showTooltip: false,
249                tooltipLegendTemplate: getTooltipLegendTemplate,
250            })
251        );
252
253        verticalGroup.addSurfaceToGroup(sciChartSurface);
254
255        return { wasmContext, sciChartSurface };
256    };
257
258    // CHART 2 - MACD
259    const drawMacdChart = async (rootElement: string | HTMLDivElement) => {
260        const [{ wasmContext, sciChartSurface }, { dateValues, closeValues }] = await Promise.all([
261            SciChartSurface.create(rootElement, {
262                // prevent default size settings
263                disableAspect: true,
264                theme: appTheme.SciChartJsTheme,
265            }),
266            dataPromise,
267        ]);
268
269        chart2XAxis = new CategoryAxis(wasmContext, {
270            drawLabels: false,
271            drawMajorTickLines: false,
272            drawMinorTickLines: false,
273        });
274        sciChartSurface.xAxes.add(chart2XAxis);
275
276        const yAxis = new NumericAxis(wasmContext, {
277            autoRange: EAutoRange.Always,
278            growBy: new NumberRange(0.1, 0.1),
279            axisAlignment,
280            labelPrecision: 2,
281            cursorLabelPrecision: 2,
282            labelStyle: { alignment: ELabelAlignment.Right },
283        });
284        yAxis.labelProvider.numericFormat = ENumericFormat.Decimal;
285        sciChartSurface.yAxes.add(yAxis);
286
287        const macdArray: number[] = [];
288        const signalArray: number[] = [];
289        const divergenceArray: number[] = [];
290        for (let i = 0; i < dateValues.length; i++) {
291            const maSlow = calcAverageForArray(closeValues, 12, i);
292            const maFast = calcAverageForArray(closeValues, 25, i);
293            const macd = maSlow - maFast;
294            macdArray.push(macd);
295            const signal = calcAverageForArray(macdArray, 9, i);
296            signalArray.push(signal);
297            const divergence = macd - signal;
298            divergenceArray.push(divergence);
299        }
300
301        const bandSeries = new FastBandRenderableSeries(wasmContext, {
302            dataSeries: new XyyDataSeries(wasmContext, {
303                dataSeriesName: "MACD",
304                xValues: dateValues,
305                yValues: signalArray,
306                y1Values: macdArray,
307            }),
308            stroke: downCol,
309            strokeY1: upCol,
310            fill: upCol + "77",
311            fillY1: downCol + "77",
312        });
313        sciChartSurface.renderableSeries.add(bandSeries);
314
315        const columnSeries = new FastColumnRenderableSeries(wasmContext, {
316            dataSeries: new XyDataSeries(wasmContext, {
317                dataSeriesName: "Divergence",
318                xValues: dateValues,
319                yValues: divergenceArray,
320            }),
321            paletteProvider: new MacdHistogramPaletteProvider(upCol + "AA", downCol + "AA"),
322            dataPointWidth: 0.5,
323        });
324        sciChartSurface.renderableSeries.add(columnSeries);
325
326        sciChartSurface.chartModifiers.add(
327            new ZoomPanModifier({ enableZoom: true, xyDirection: EXyDirection.XDirection })
328        );
329        sciChartSurface.chartModifiers.add(new ZoomExtentsModifier({ xyDirection: EXyDirection.XDirection }));
330        sciChartSurface.chartModifiers.add(new MouseWheelZoomModifier({ xyDirection: EXyDirection.XDirection }));
331        sciChartSurface.chartModifiers.add(
332            new RolloverModifier({
333                modifierGroup: "cursorGroup",
334                showTooltip: false,
335                tooltipLegendTemplate: getTooltipLegendTemplate,
336            })
337        );
338
339        verticalGroup.addSurfaceToGroup(sciChartSurface);
340
341        return { wasmContext, sciChartSurface };
342    };
343
344    // CHART 3 - RSI
345    const drawRsiChart = async (rootElement: string | HTMLDivElement) => {
346        const [{ wasmContext, sciChartSurface }, { dateValues, closeValues }] = await Promise.all([
347            SciChartSurface.create(rootElement, {
348                // prevent default size settings
349                disableAspect: true,
350                theme: appTheme.SciChartJsTheme,
351            }),
352            dataPromise,
353        ]);
354
355        chart3XAxis = new CategoryAxis(wasmContext, {
356            autoRange: EAutoRange.Once,
357            labelProvider: new SmartDateLabelProvider(),
358        });
359        sciChartSurface.xAxes.add(chart3XAxis);
360
361        const yAxis = new NumericAxis(wasmContext, {
362            autoRange: EAutoRange.Always,
363            growBy: new NumberRange(0.1, 0.1),
364            labelPrecision: 0,
365            cursorLabelPrecision: 0,
366            axisAlignment,
367            labelStyle: { alignment: ELabelAlignment.Right },
368        });
369        yAxis.labelProvider.numericFormat = ENumericFormat.Decimal;
370        sciChartSurface.yAxes.add(yAxis);
371
372        const RSI_PERIOD = 14;
373        const rsiArray: number[] = [];
374        const gainArray: number[] = [];
375        const lossArray: number[] = [];
376        rsiArray.push(NaN);
377        gainArray.push(NaN);
378        lossArray.push(NaN);
379        for (let i = 1; i < dateValues.length; i++) {
380            const previousClose = closeValues[i - 1];
381            const currentClose = closeValues[i];
382            const gain = currentClose > previousClose ? currentClose - previousClose : 0;
383            gainArray.push(gain);
384            const loss = previousClose > currentClose ? previousClose - currentClose : 0;
385            lossArray.push(loss);
386            const relativeStrength =
387                calcAverageForArray(gainArray, RSI_PERIOD) / calcAverageForArray(lossArray, RSI_PERIOD);
388            const rsi = 100 - 100 / (1 + relativeStrength);
389            rsiArray.push(rsi);
390        }
391        const rsiRenderableSeries = new FastLineRenderableSeries(wasmContext, {
392            dataSeries: new XyDataSeries(wasmContext, {
393                dataSeriesName: "RSI",
394                xValues: dateValues,
395                yValues: rsiArray,
396            }),
397            stroke: appTheme.MutedBlue,
398            strokeThickness: 2,
399        });
400        sciChartSurface.renderableSeries.add(rsiRenderableSeries);
401
402        sciChartSurface.chartModifiers.add(
403            new ZoomPanModifier({ enableZoom: true, xyDirection: EXyDirection.XDirection })
404        );
405        sciChartSurface.chartModifiers.add(new ZoomExtentsModifier({ xyDirection: EXyDirection.XDirection }));
406        sciChartSurface.chartModifiers.add(new MouseWheelZoomModifier({ xyDirection: EXyDirection.XDirection }));
407        sciChartSurface.chartModifiers.add(
408            new RolloverModifier({
409                modifierGroup: "cursorGroup",
410                showTooltip: false,
411                tooltipLegendTemplate: getTooltipLegendTemplate,
412            })
413        );
414
415        verticalGroup.addSurfaceToGroup(sciChartSurface);
416
417        return { wasmContext, sciChartSurface };
418    };
419
420    // DRAW OVERVIEW
421    // Must be done after main chart creation
422    const drawOverview = (mainSurface: SciChartSurface) => async (rootElement: string | HTMLDivElement) => {
423        const overview = await SciChartOverview.create(mainSurface, rootElement, {
424            // prevent default size settings
425            disableAspect: true,
426            theme: appTheme.SciChartJsTheme,
427            transformRenderableSeries: getOverviewSeries,
428        });
429
430        return { sciChartSurface: overview.overviewSciChartSurface };
431    };
432
433    const configureAfterInit = () => {
434        const synchronizeAxes = () => {
435            // TODO refactor using AxisSynchroniser
436
437            // SYNCHRONIZE VISIBLE RANGES
438            chart1XAxis.visibleRangeChanged.subscribe((data1) => {
439                chart2XAxis.visibleRange = data1.visibleRange;
440                chart3XAxis.visibleRange = data1.visibleRange;
441            });
442            chart2XAxis.visibleRangeChanged.subscribe((data1) => {
443                chart1XAxis.visibleRange = data1.visibleRange;
444                chart3XAxis.visibleRange = data1.visibleRange;
445            });
446            chart3XAxis.visibleRangeChanged.subscribe((data1) => {
447                chart1XAxis.visibleRange = data1.visibleRange;
448                chart2XAxis.visibleRange = data1.visibleRange;
449            });
450        };
451
452        synchronizeAxes();
453
454        // Force showing the latest 200 bars
455        const oneDay = 600; // One day in javascript Date() has a value of 600
456        const twoHundredDays = oneDay * 200; // 200 days in JS date
457        const twoHundredDaysSciChartFormat = twoHundredDays / 1000; // SciChart expects date.getTime() / 1000
458        chart1XAxis.visibleRange = new NumberRange(
459            chart1XAxis.visibleRange.max - twoHundredDaysSciChartFormat,
460            chart1XAxis.visibleRange.max
461        );
462    };
463
464    return { drawPriceChart, drawMacdChart, drawRsiChart, drawOverview, configureAfterInit };
465};
466
467/**
468 * An example PaletteProvider applied to the volume column series. It will return green / red
469 * fills and strokes when the main price data bar is up or down
470 */
471class VolumePaletteProvider implements IStrokePaletteProvider, IFillPaletteProvider {
472    public readonly strokePaletteMode: EStrokePaletteMode = EStrokePaletteMode.SOLID;
473    public readonly fillPaletteMode: EFillPaletteMode = EFillPaletteMode.SOLID;
474    private priceData: OhlcDataSeries;
475    private volumeUpArgb: number;
476    private volumnDownArgb: number;
477
478    constructor(priceData: OhlcDataSeries, volumeUpColor: string, volumeDownColor: string) {
479        this.priceData = priceData;
480        this.volumeUpArgb = parseColorToUIntArgb(volumeUpColor);
481        this.volumnDownArgb = parseColorToUIntArgb(volumeDownColor);
482    }
483
484    onAttached(parentSeries: IRenderableSeries): void {}
485
486    onDetached(): void {}
487
488    overrideFillArgb(xValue: number, yValue: number, index: number): number {
489        const open = this.priceData.getNativeOpenValues().get(index);
490        const close = this.priceData.getNativeCloseValues().get(index);
491
492        return close >= open ? this.volumeUpArgb : this.volumnDownArgb;
493    }
494
495    overrideStrokeArgb(xValue: number, yValue: number, index: number): number {
496        return this.overrideFillArgb(xValue, yValue, index);
497    }
498}
499
500// tslint:disable-next-line:max-classes-per-file
501class MacdHistogramPaletteProvider implements IStrokePaletteProvider, IFillPaletteProvider {
502    public readonly strokePaletteMode: EStrokePaletteMode = EStrokePaletteMode.SOLID;
503    public readonly fillPaletteMode: EFillPaletteMode = EFillPaletteMode.SOLID;
504    private aboveZeroArgb: number;
505    private belowZeroArgb: number;
506
507    constructor(aboveZeroColor: string, belowZeroColor: string) {
508        this.aboveZeroArgb = parseColorToUIntArgb(aboveZeroColor);
509        this.belowZeroArgb = parseColorToUIntArgb(belowZeroColor);
510    }
511
512    onAttached(parentSeries: IRenderableSeries): void {}
513
514    onDetached(): void {}
515
516    overrideFillArgb(xValue: number, yValue: number, index: number): number {
517        return yValue >= 0 ? this.aboveZeroArgb : this.belowZeroArgb;
518    }
519
520    overrideStrokeArgb(xValue: number, yValue: number, index: number): number {
521        return this.overrideFillArgb(xValue, yValue, index);
522    }
523}
524