Slow Stochastic Oscillator Indicator
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Topic Overview

Purpose

This topic provides a conceptual overview of the IGChartView™ control’s Slow Stochastic Oscillator Indicator and demonstrates how to add it to the chart view using a code example.

In this topic


Introduction

Slow Stochastic Oscillator Indicator summary

The Slow Stochastic Oscillator indicator is a momentum financial indicator that displays the closing price, relative to the high-low range over a given period using a scale of 0 to 100. The basis for this indicator is the premise that prices will close near 100 in a rising market and close near 0 in a declining market.

Use the Fast Stochastic Oscillator indicator to identify buying or selling divergences. The Slow Stochastic Oscillator uses a 3-day SMA while the Full Stochastic Oscillator is the Slow Stochastic Oscillator with a customized period.

Data requirements

While the IGChartView control allows easy binding to your own data model, make sure to supply the appropriate amounts and types of data required by the series. If the data does not meet the minimum requirements, based on the type of series that you are using, the IGChartView will appear to be blank.

Required – the data model must contain numeric fields, representing the high, low, and closing price in order to render data.


Adding a Slow Stochastic Oscillator Indicator to the IGChartView – Code Example

Description

The following code uses the IGOHLCSeriesDataSourceHelper to supply randomly generated data to a financial price series by first adding to the IGChartView instance, then next adding the financial indicator to the IGChartView instance as a series, and then finally adding the IGChartView as a subview of the current UIView.

Prerequisites

This code example requires the inclusion of the IGChartView framework, detail about how to add this framework can be found in the Adding the Chart Framework File topic.

Code

In C#:

List<NSObject> open = new List<NSObject>();
for (int i = 0; i < 25; i++) {
      open.Add(new NSNumber((new Random((int)DateTime.Now.Ticks).Next(100))));
}
List<NSObject> high = new List<NSObject>();
for (int i = 0; i < 25; i++) {
      high.Add(new NSNumber((new Random((int)DateTime.Now.Ticks).Next(130))));
}
List<NSObject> low = new List<NSObject>();
for (int i = 0; i < 25; i++) {
      low.Add(new NSNumber((new Random((int)DateTime.Now.Ticks).Next(100))));
}
List<NSObject> close = new List<NSObject>();
for (int i = 0; i < 25; i++) {
      close.Add(new NSNumber((new Random((int)DateTime.Now.Ticks).Next(110))));
}
List<NSObject> volume = new List<NSObject>();
for (int i = 0; i < 25; i++) {
      volume.Add(new NSNumber((new Random((int)DateTime.Now.Ticks).Next(1100000))));
}
IGOHLCSeriesDataSourceHelper source = new IGOHLCSeriesDataSourceHelper();
source.OpenValues = open.ToArray();
source.HighValues = high.ToArray();
source.LowValues = low.ToArray();
source.CloseValues = close.ToArray();
source.VolumeValues = volume.ToArray();
IGChartView infraChart = new IGChartView(this.View.Frame);
infraChart.AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight;
IGCategoryXAxis xAxis = new IGCategoryXAxis("xAxis");
IGNumericYAxis yAxis = new IGNumericYAxis("yAxis");
infraChart.AddAxis(xAxis);
infraChart.AddAxis(yAxis);
IGFinancialPriceSeries financialPriceSeries = new IGFinancialPriceSeries("financialPriceSeries");
financialPriceSeries.XAxis = xAxis;
financialPriceSeries.YAxis = yAxis;
financialPriceSeries.DataSource = source;
financialPriceSeries.DisplayType = IGPriceDisplayType.IGPriceDisplayTypeCandlestick;
IGSlowStochasticOscillatorIndicator financialIndicator = new IGSlowStochasticOscillatorIndicator("financialIndicator");
financialIndicator.XAxis = xAxis;
financialIndicator.YAxis = yAxis;
financialIndicator.DataSource = source;
financialIndicator.Thickness = 3.0f;
infraChart.AddSeries(financialPriceSeries);
infraChart.AddSeries(financialIndicator);
(this.View).AddSubview(infraChart);

In Objective-C:

    NSMutableArray *open = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++) {
        [open addObject:[[NSNumber alloc] initWithDouble:(arc4random() % 100)]];
    }
    
    NSMutableArray *high = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++) {
        [high addObject:[[NSNumber alloc] initWithDouble:(arc4random() % 100 + 30)]];
    }
    
    NSMutableArray *low = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++) {
        [low addObject:[[NSNumber alloc] initWithDouble:(arc4random() % 100)]];
    }
    
    NSMutableArray *close = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++) {
        [close addObject:[[NSNumber alloc] initWithDouble:(arc4random() % 100 + 10)]];
    }
    
    NSMutableArray *volume = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++)
    {
        [volume addObject:[[NSNumber alloc] initWithDouble:(arc4random() % 1000000 + 100000)]];
    }
    
    IGOHLCSeriesDataSourceHelper *source = [[IGOHLCSeriesDataSourceHelper alloc] init];
    source.openValues = open;
    source.highValues = high;
    source.lowValues = low;
    source.closeValues = close;
    source.volumeValues = volume;
    
    IGChartView *infraChart = [[IGChartView alloc] initWithFrame:self.view.frame];
    [infraChart setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
    
    IGCategoryXAxis *xAxis = [[IGCategoryXAxis alloc] initWithKey:@"xAxis"];
    IGNumericYAxis *yAxis = [[IGNumericYAxis alloc] initWithKey:@"yAxis"];
    [infraChart addAxis:xAxis];
    [infraChart addAxis:yAxis];
    
    IGFinancialPriceSeries *financialPriceSeries = [[IGFinancialPriceSeries alloc] initWithKey:@"financialPriceSeries"];
    financialPriceSeries.xAxis = xAxis;
    financialPriceSeries.yAxis = yAxis;
    financialPriceSeries.dataSource = source;
    financialPriceSeries.displayType = IGPriceDisplayTypeCandlestick;
    IGSlowStochasticOscillatorIndicator *financialIndicator = [[IGSlowStochasticOscillatorIndicator alloc] initWithKey:@"financialIndicator"];
    financialIndicator.xAxis = xAxis;
    financialIndicator.yAxis = yAxis;
    financialIndicator.dataSource = source;
    financialIndicator.thickness = 3.0f;
    
    [infraChart addSeries:financialPriceSeries];
    [infraChart addSeries:financialIndicator];
    [self.view addSubview:infraChart];

Related Content

Topics

The following topics provide additional information related to this topic.

Topic

Purpose

This collection of topics explains each of the individual charts supported by the IGChartView control.