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Trendlines in JavaScript Stock Chart control

Trendlines are used to show the direction and speed of price.

StockChart supports 6 types of trendlines namely Linear,Exponential,Logarithmic,Polynomial,Power,Moving Average. By using trendline dropdown button you can add or remove the required trendline type.

Linear

A linear trendline is a best fit straight line that is used with simpler data sets. To render a linear trendline, use trendline type as Linear and inject Trendlines module using StockChart.Inject(Trendlines).

Exponential

An exponential trendline is a curved line that is most useful when data values rise or fall at increasingly higher rates. You cannot create an exponential trendline, if your data contains zero or negative values.

To render a exponential trendline, use trendline type as Exponential and inject Trendlines module using StockChart.Inject(Trendlines).

Logarithmic

A logarithmic trendline is a best-fit curved line that is most useful when the rate of change in the data increases or decreases quickly and then levels out. A logarithmic trendline can use negative and/or positive values.

To render a logarithmic trendline, use trendline type as Logarithmic and inject Trendlines module using StockChart.Inject(Trendlines).

Polynomial

A polynomial trendline is a curved line that is used when data fluctuates.

To render a polynomial trendline, use trendline type as Polynomial and inject Trendlines module using StockChart.Inject(Trendlines).

polynomialOrder used to define the polynomial value.

Power

A power trendline is a curved line that is best used with data sets that compare measurements that increase at a specific rate.

To render a power trendline, use trendline type as Power and inject Trendlines module using StockChart.Inject(Trendlines).

Moving Average

A moving average trendline smoothen out fluctuations in data to show a pattern or trend more clearly.

To render a moving average trendline, use trendline type as MovingAverage and inject Trendlines module using StockChart.Inject(Trendlines).

period property defines the period to find the moving average.

Source
Preview
index.ts
index.html
import { StockChart } from '@syncfusion/ej2-charts';
import { DateTime,AreaSeries, CandleSeries, HiloOpenCloseSeries, HiloSeries, LineSeries ,Logarithmic } from '@syncfusion/ej2-charts';
import { SplineAreaSeries, SplineSeries  } from '@syncfusion/ej2-charts';
import { AccumulationDistributionIndicator, AtrIndicator, BollingerBands, EmaIndicator, MomentumIndicator } from '@syncfusion/ej2-charts';
import { MacdIndicator, RsiIndicator, Trendlines, SmaIndicator, StochasticIndicator, Export } from '@syncfusion/ej2-charts';
import { TmaIndicator, RangeTooltip, Tooltip, Crosshair, IStockChartEventArgs, ChartTheme } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
StockChart.Inject(DateTime,Logarithmic,  AreaSeries, CandleSeries, HiloOpenCloseSeries, HiloSeries, LineSeries, SplineAreaSeries, SplineSeries );
StockChart.Inject(AccumulationDistributionIndicator, AtrIndicator, BollingerBands, EmaIndicator, MomentumIndicator);
StockChart.Inject(MacdIndicator, RsiIndicator, SmaIndicator, StochasticIndicator);
StockChart.Inject(Trendlines, TmaIndicator, RangeTooltip, Tooltip, Crosshair, Export);

let stockChart: StockChart = new StockChart({
    primaryXAxis: {
        title: 'Months',
    },
    primaryYAxis: {
        title: 'Rupees against Dollars',
        interval: 5
    },
    tooltip:{enable:true},
    chartArea: { border: { width: 0 } },
    series: [{
        dataSource: chartData,
        name: 'Apple Inc',
        fill: '#0066FF',
        //Series type as candle
        type: 'Candle',
        trendlines: [{ type: 'MovingAverage', enableTooltip:false }]
    }],
    seriesType: [],
    indicatorType: [],
    exportType: [],
    title: 'Historical Indian Rupee Rate (INR USD)'
});
stockChart.appendTo('#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="./index.css" rel="stylesheet" />
    <link href="http://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Customization of Trendline

The fill and width properties are used to customize the appearance of the trendline.

Source
Preview
index.ts
index.html
import { StockChart } from '@syncfusion/ej2-charts';
import { DateTime,AreaSeries, CandleSeries, HiloOpenCloseSeries, HiloSeries, LineSeries ,Logarithmic } from '@syncfusion/ej2-charts';
import { SplineAreaSeries, SplineSeries  } from '@syncfusion/ej2-charts';
import { AccumulationDistributionIndicator, AtrIndicator, BollingerBands, EmaIndicator, MomentumIndicator } from '@syncfusion/ej2-charts';
import { MacdIndicator, RsiIndicator, Trendlines, SmaIndicator, StochasticIndicator, Export } from '@syncfusion/ej2-charts';
import { TmaIndicator, RangeTooltip, Tooltip, Crosshair, IStockChartEventArgs, ChartTheme } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
StockChart.Inject(DateTime,Logarithmic,  AreaSeries, CandleSeries, HiloOpenCloseSeries, HiloSeries, LineSeries, SplineAreaSeries, SplineSeries );
StockChart.Inject(AccumulationDistributionIndicator, AtrIndicator, BollingerBands, EmaIndicator, MomentumIndicator);
StockChart.Inject(MacdIndicator, RsiIndicator, SmaIndicator, StochasticIndicator);
StockChart.Inject(Trendlines, TmaIndicator, RangeTooltip, Tooltip, Crosshair, Export);

let stockChart: StockChart = new StockChart({
    primaryXAxis: {
        title: 'Months',
    },
    primaryYAxis: {
        title: 'Rupees against Dollars',
        interval: 5
    },
    tooltip:{enable:true},
    chartArea: { border: { width: 0 } },
    series: [{
        dataSource: chartData,
        name: 'Apple Inc',
        fill: '#0066FF',
        //Series type as candle
        type: 'Candle',
        trendlines: [{ type: 'MovingAverage', enableTooltip:false, fill: 'red', width:2 }]
    }],
    seriesType: [],
    indicatorType: [],
    exportType: [],
    title: 'Historical Indian Rupee Rate (INR USD)'
});
stockChart.appendTo('#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="./index.css" rel="stylesheet" />
    <link href="http://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>