Trend lines in Vue Stock chart component

13 Jun 202412 minutes to read

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 provide.

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 provide.

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 provide.

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 provide.

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 provide.

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 provide.

period property defines the period to find the moving average.

Composition API (~/src/App.vue)

<template>
  <div class="control-section">
    <div>
      <ejs-stockchart id="stockchartcontainer" :primaryXAxis="primaryXAxis" :primaryYAxis="primaryYAxis"
        :seriesType="seriesType" :indicatorType="indicatorType" :exportType="exportType" :title="title">
        <e-stockchart-series-collection>
          <e-stockchart-series :dataSource="seriesData" type="Candle" volume='volume' xName='date' low='low' high='high'
            open='open' close='close'>
            <e-trendlines>
              <e-trendline :type='type'></e-trendline>
            </e-trendlines>
          </e-stockchart-series>
        </e-stockchart-series-collection>
      </ejs-stockchart>
    </div>
  </div>
</template>
<script setup>
import { provide } from "vue";

import { chartData } from "./datasource.js";
import {
  StockChartComponent as EjsStockchart, StockChartSeriesCollectionDirective as EStockchartSeriesCollection, StockChartSeriesDirective as EStockchartSeries, StockChartTrendlinesDirective as ETrendlines, StockChartTrendlineDirective as ETrendline, DateTime, CandleSeries, RangeTooltip, Trendlines
} from "@syncfusion/ej2-vue-charts";

const seriesData = chartData;
const seriesType = [];
const indicatorType = [];
const exportType = [];
const type = 'MovingAverage';
const primaryXAxis = {
  valueType: "DateTime",
  majorGridLines: { color: "transparent" },
};
const primaryYAxis = {
  majorTickLines: { color: "transparent", width: 0 }
};
const title = 'AAPL Stock Price';

provide('stockChart', [
  DateTime, RangeTooltip, CandleSeries, Trendlines
]);

</script>
<style>
#container {
  height: 350px;
}
</style>

Options API (~/src/App.vue)

<template>
  <div class="control-section">
    <div>
      <ejs-stockchart
        id="stockchartcontainer"
        :primaryXAxis="primaryXAxis"
        :primaryYAxis="primaryYAxis"
        :seriesType="seriesType"
        :indicatorType="indicatorType"
        :exportType="exportType"
        :title="title">
        <e-stockchart-series-collection>
          <e-stockchart-series :dataSource="seriesData" type="Candle"  volume='volume' xName='date' low='low' high='high' open='open' close='close'>
          <e-trendlines>
              <e-trendline :type='type'></e-trendline>
          </e-trendlines>
          </e-stockchart-series>
        </e-stockchart-series-collection>
      </ejs-stockchart>
    </div>
  </div>
</template>
<script>

import { chartData } from "./datasource.js";
import {
  StockChartComponent, StockChartSeriesCollectionDirective, StockChartSeriesDirective, StockChartTrendlinesDirective, StockChartTrendlineDirective, DateTime, CandleSeries, RangeTooltip,Trendlines
} from "@syncfusion/ej2-vue-charts";


export default {
name: "App",
components: {
    'ejs-stockchart': StockChartComponent,
    'e-stockchart-series-collection': StockChartSeriesCollectionDirective,
    'e-stockchart-series': StockChartSeriesDirective,
    'e-trendlines': StockChartTrendlinesDirective,
    'e-trendline': StockChartTrendlineDirective
  },
  data() {
    return {
        seriesData:chartData,
         seriesType:[],
        indicatorType:[],
        exportType: [],
        type: 'MovingAverage',
        primaryXAxis: {
            valueType: "DateTime",
            majorGridLines: { color: "transparent" },
        },
        primaryYAxis: {
            majorTickLines: { color: "transparent", width: 0 }
        },
      title: 'AAPL Stock Price',
    };
  },
  provide: {
    stockChart: [
      DateTime, RangeTooltip,  CandleSeries, Trendlines
    ]
  }
};
</script>
<style>
#container {
   height: 350px;
 }
</style>

Customization of Trendlines

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

Composition API (~/src/App.vue)

<template>
  <div class="control-section">
    <div>
      <ejs-stockchart id="stockchartcontainer" :primaryXAxis="primaryXAxis" :primaryYAxis="primaryYAxis"
        :seriesType="seriesType" :indicatorType="indicatorType" :exportType="exportType" :title="title">
        <e-stockchart-series-collection>
          <e-stockchart-series :dataSource="seriesData" type="Candle" volume='volume' xName='date' low='low' high='high'
            open='open' close='close'>
            <e-trendlines>
              <e-trendline :type='type'></e-trendline>
            </e-trendlines>
          </e-stockchart-series>
        </e-stockchart-series-collection>
      </ejs-stockchart>
    </div>
  </div>
</template>
<script setup>
import { provide } from "vue";

import { chartData } from "./datasource.js";
import {
  StockChartComponent as EjsStockchart, StockChartSeriesCollectionDirective as EStockchartSeriesCollection, StockChartSeriesDirective as EStockchartSeries, StockChartTrendlinesDirective as ETrendlines, StockChartTrendlineDirective as ETrendline, DateTime, CandleSeries, RangeTooltip, Trendlines
} from "@syncfusion/ej2-vue-charts";

const seriesData = chartData;
const seriesType = [];
const indicatorType = [];
const exportType = [];
const type = 'MovingAverage';
const primaryXAxis = {
  valueType: "DateTime",
  majorGridLines: { color: "transparent" },
};
const primaryYAxis = {
  majorTickLines: { color: "transparent", width: 0 }
};
const title = 'AAPL Stock Price';

provide('stockChart', [
  DateTime, RangeTooltip, CandleSeries, Trendlines
]);

</script>
<style>
#container {
  height: 350px;
}
</style>

Options API (~/src/App.vue)

<template>
  <div class="control-section">
    <div>
      <ejs-stockchart id="stockchartcontainer" :primaryXAxis="primaryXAxis" :primaryYAxis="primaryYAxis"
        :seriesType="seriesType" :indicatorType="indicatorType" :exportType="exportType" :title="title">
        <e-stockchart-series-collection>
          <e-stockchart-series :dataSource="seriesData" type="Candle" volume='volume' xName='date' low='low' high='high'
            open='open' close='close'>
            <e-trendlines>
              <e-trendline :type='type'></e-trendline>
            </e-trendlines>
          </e-stockchart-series>
        </e-stockchart-series-collection>
      </ejs-stockchart>
    </div>
  </div>
</template>
<script>

import { chartData } from "./datasource.js";
import {
  StockChartComponent, StockChartSeriesCollectionDirective, StockChartSeriesDirective, StockChartTrendlinesDirective, StockChartTrendlineDirective, DateTime, CandleSeries, RangeTooltip, Trendlines
} from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-stockchart': StockChartComponent,
    'e-stockchart-series-collection': StockChartSeriesCollectionDirective,
    'e-stockchart-series': StockChartSeriesDirective,
    'e-trendlines': StockChartTrendlinesDirective,
    'e-trendline': StockChartTrendlineDirective
  },
  data() {
    return {
      seriesData: chartData,
      seriesType: [],
      indicatorType: [],
      exportType: [],
      type: 'MovingAverage',
      primaryXAxis: {
        valueType: "DateTime",
        majorGridLines: { color: "transparent" },
      },
      primaryYAxis: {
        majorTickLines: { color: "transparent", width: 0 }
      },
      title: 'AAPL Stock Price',
    };
  },
  provide: {
    stockChart: [
      DateTime, RangeTooltip, CandleSeries, Trendlines
    ]
  }
};
</script>
<style>
#container {
  height: 350px;
}
</style>