iOS Charting Documentation - SciChart iOS Charts SDK v3.x

The Candlestick Series type

The Candlestick charts are provided by the SCIFastCandlestickRenderableSeries type. This accepts data (X, Open, High, Low, Close) from a SCIOhlcDataSeries and renders candlesticks at each X-Value coordinate.

NOTE: For more info about SCIOhlcDataSeries, as well as other DataSeries types in SciChart, see the DataSeries API article.

Candlestick Series Type

NOTE: Examples of the Candlestick Series can be found in the SciChart iOS Examples Suite as well as on GitHub:

The SCIFastCandlestickRenderableSeries is very much alike the SCIFastOhlcRenderableSeries class. It allows to specify FillUp and FillDown brushes, StrokeUp and StrokeDown pens via the following properties:

StrokeUp and FillUp styles are applied to bars with Close >= Open, and StrokeDown and FillDown to those that have Close < Open respectively.

NOTE: To learn more about Pens and Brushes and how to utilize them, please refer to the SCIPenStyle, SCIBrushStyle and SCIFontStyle article.

Also, the SCIOhlcRenderableSeriesBase.dataPointWidth specifies how much space a single bar occupies, varying from 0 to 1 (when columns are conjoined).

NOTE: In multi axis scenarios, a series has to be assigned to particular X and Y axes. This can be done by passing the axes IDs to the ISCIRenderableSeries.xAxisId, ISCIRenderableSeries.yAxisId properties.

Create a Candlestick Series

To create a Candlestick Series, use the following code:

// Assume a surface has been created and configured somewhere id<ISCIChartSurface> surface; // Create DataSeries and fill it with some data SCIOhlcDataSeries *dataSeries = [[SCIOhlcDataSeries alloc] initWithXType:SCIDataType_Date yType:SCIDataType_Double]; // Create Candlestick Series SCIFastCandlestickRenderableSeries *candlestickSeries = [SCIFastCandlestickRenderableSeries new]; candlestickSeries.dataSeries = dataSeries; candlestickSeries.strokeUpStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF00AA00 thickness:1]; candlestickSeries.fillUpBrushStyle = [[SCISolidBrushStyle alloc] initWithColorCode:0x9000AA00]; candlestickSeries.strokeDownStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFFFF0000 thickness:1]; candlestickSeries.fillDownBrushStyle = [[SCISolidBrushStyle alloc] initWithColorCode:0x90FF0000]; [surface.renderableSeries add:candlestickSeries];
// Assume a surface has been created and configured somewhere let surface: ISCIChartSurface // Create DataSeries and fill it with some data let dataSeries = SCIOhlcDataSeries(xType: .date, yType: .double) // Create Candlestick Series let candlestickSeries = SCIFastCandlestickRenderableSeries() candlestickSeries.dataSeries = dataSeries candlestickSeries.strokeUpStyle = SCISolidPenStyle(colorCode: 0xFF00AA00, thickness: 1.0) candlestickSeries.fillUpBrushStyle = SCISolidBrushStyle(colorCode: 0x9000AA00) candlestickSeries.strokeDownStyle = SCISolidPenStyle(colorCode: 0xFFFF0000, thickness: 1.0) candlestickSeries.fillDownBrushStyle = SCISolidBrushStyle(colorCode: 0x90FF0000) surface.renderableSeries.add(candlestickSeries)
// Assume a surface has been created and configured somewhere IISCIChartSurface surface; // Create DataSeries and fill it with some data var dataSeries = new OhlcDataSeries<DateTime, double>(); // Create Candlestick Series var candlestickSeries = new SCIFastCandlestickRenderableSeries { DataSeries = dataSeries, StrokeUpStyle = new SCISolidPenStyle(0xFF00AA00, 1f), StrokeDownStyle = new SCISolidPenStyle(0xFFFF0000, 1f), FillUpBrushStyle = new SCISolidBrushStyle(0x8800AA00), FillDownBrushStyle = new SCISolidBrushStyle(0x88FF0000) }; surface.RenderableSeries.Add(candlestickSeries);

Candlestick Series Features

Candlestick Series also has some features similar to other series, such as:

Render a Gap in a Candlestick Series

It’s possible to render a Gap in Candlestick series, by passing a data point with a NaN as the Open, High, Low, Close values. Please refer to the RenderableSeries APIs article for more details.

Specify Color for Individual Candlesticks

In SciChart, you can draw each bar of the Candlestick Series with different colors using the PaletteProvider API. To Use palette provider for Candlestick Series - a custom ISCIFillPaletteProvider (or ISCIStrokePaletteProvider) has to be provided to the ISCIRenderableSeries.paletteProvider property. Please refer to the PaletteProvider API article for more info.