JavaScript Candlestick Chart

This demo application belongs to the set of examples for LightningChart JS, data visualization library for JavaScript.

LightningChart JS is entirely GPU accelerated and performance optimized charting library for presenting massive amounts of data. It offers an easy way of creating sophisticated and interactive charts and adding them to your website or web application.

The demo can be used as an example or a seed project. Local execution requires the following steps:

• Make sure that relevant version of Node.js is installed

• Open the project folder in a terminal:

    npm install              # fetches dependencies
    npm start                # builds an application and starts the development server
  

• The application is available at http://localhost:8080 in your browser, webpack-dev-server provides hot reload functionality.

Description

Also known as Japanese Candlestick Chart

Please note that using LightningChart JS for Trading use cases requires a special license agreement. For more information, please contact us.

This example shows basic implementation of candlestick chart using OHLCSeries. This type of chart is used as a trading tool to visualize price movements. A candlestick figure can represent multiple recorded values, which are packed into 4 values (open, high, low and close). This makes it useful for dynamically displaying data from longer intervals as well as shorter.

OHLCSeries are created using ChartXY method.

const chart = lightningChart().ChartXY()
// Method for adding OHLCSeries takes one argument: seriesConstructor.
const ohlcSeries = chart.addOHLCSeries(
    // Specify type of figure used
    { seriesConstructor: OHLCFigures.Candlestick },
)

OHLCSeries accept data in the form of interface 'XOHLC':

const xohlc = [
    // X-position
    0,
    // Opening Y-value
    100,
    // Highest Y-value
    200,
    // Lowest Y-value
    50,
    // Closing Y-value
    75,
]
// Add new segment to series.
ohlcSeries.add(xohlc)

add() can be called with a single XOHLC-object or with an array of them.

Anatomy of a candlestick figure

Candlesticks are formed from two parts: Body and Lines. Both of these can be individually styled.

API Links

• XY cartesian chart
• Axis tick strategies
• Figure types
• OHLC series
• XOHLC datastructure
• OHLC generator

Support

If you notice an error in the example code, please open an issue on GitHub repository of the entire example.

Official API documentation can be found on LightningChart website.

If the docs and other materials do not solve your problem as well as implementation help is needed, ask on StackOverflow (tagged lightningchart).

If you think you found a bug in the LightningChart JavaScript library, please contact sales@lightningchart.com.

Direct developer email support can be purchased through a Support Plan or by contacting sales@lightningchart.com.

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