JavaScript Candlestick Charts Examples

By | March 23, 2021

candlestick chart javascript

Table of Contents

Determines if the chart will animate on the initial draw. If true, the chart will start at the baseline and animate to its final state. In the SciChart.js demo – Candlestick Charts – volume bars are docked to the bottom of the chart. You can format the date labels on the XAxis by following the instructions on the Axis Label Formatting page. A CategoryAxis is necessary if you have Forex or Stock market data which includes weekend or overnight gaps, as this axis type measures by x-index, not by x-value.

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Now that everything is set up, proceed to the chart code itself. By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. OHLCSeries accepts data in the form of interface ‘XOHLC’.

Step 4: Write the JS candlestick chart code

Replaces the automatically generated X-axis ticks with the specified array. Do you have trading data, looking for a way to effectively visualize it for your website or app project? If so, a JS candlestick chart could be your best pick. This tutorial will break down the process needed to create such a chart into simple steps and provide a detailed explanation of the code.

candlestick chart javascript

It is very easy to create interactive charts for apps and websites using specialized JavaScript tools for data visualization like LightningChart JS. Anyone with a basic understanding of coding can create professional interactive charts. Understanding the key components of a candle and what it stands for is crucial when analyzing candlestick charts for a trading strategy.

How to Create Candlestick Chart with JavaScript for Stock Analysis

Given example shows JavaScript Candle Stick Chart along with HTML source code that you can edit in-browser or save to run it locally. Based on mathematical formulas to place greater weight and importance to recent observations, it is a technical indicator widely used in financial charts to analyze data. Depending on a situation, traders may like to use different EMA periods. For example, 20-day, 30-day and 90-day moving averages. So you’ve build a basic candlestick chart in JS, with predefined styles and features. However, there are numerous things you can easily change if you need to.

  • The default font size, in pixels, of all text in the chart.
  • For example, 20-day, 30-day and 90-day moving averages.
  • On the other hand, the closing price of a security is the top of a green candlestick or the bottom of a red candlestick.
  • Candlestick charts always looked very confusing to me because I never bothered to understand them.

Also called a Japanese candlestick chart, this chart type is one of the most popular forms of financial and stock data visualization. Each candlestick represents information about the open, high, low, and close price of the day. Candlestick charts are widely used in technical analysis of price movement patterns.


Candlestick charts are a fantastic data visualization tool for tracking the price movements of stocks over a period of time. In this tutorial, I’ll show you how to create your own candlestick chart using JavaScript. Replaces the automatically generated Y-axis ticks with the specified array. Each element of the array should be either a valid tick value (such as a number, date, datetime, or timeofday), or an object. If it’s an object, it should have a v property for the tick value, and an optional f property containing the literal string to be displayed as the label.

Now that the data is loaded, let’s use the mapAs() function to transform the data fields into the fields of the candlestick chart. JavaScript OHLC charts are similar to Candle Stick Charts except that tick marks to the left & right of vertical line are used to show Opening & Closing Prices. OHLC Charts are easily customizable, interactive, responsive, supports animation, zooming, panning & exporting as image. Below example shows JavaScript OHLC Chart along with HTML source code that you can edit in-browser or save to run locally. Each candlestick supplies a simple and visually appealing picture of price action.

By default, the labels are pulled from the data,
to override, we can pull the labels out of the data… You can use visible property to show / hide a data series. You can also customize the color and thickness of line using lineColor and lineThickness. Other related customizations are color, risingColor, etc. Add() can be called with a single XOHLC object or with an array of such objects. The below snippet shows the configuration of ticks with date and time origin for the JavaScript Candlestick chart application.


With the right set of options, candlestick charts can be made to
resemble simple waterfall charts. A candlestick chart is used to show an opening and closing value
overlaid on top of a total variance. Candlestick charts are often
used to show stock value behavior. Complete this tutorial and you will be able to create a compelling interactive candlestick chart in JavaScript real quick, with ease.

The given example shows the stock price of Facebook in 2016 along with its net Income and total Revenue using combination of Candle stick and line chart. It also contains source code that you can edit in-browser or save to run it locally. The tick strategy defines the positioning candlestick chart javascript and formatting logic of axis ticks as well as the style of created ticks. Let’s use the DateTime axis tick strategy with the origin set to the current day or defined date. Look at the lower wick of the candlestick to get the security’s lowest price for the specified time period.

JavaScript Candlestick Chart

Any and all tooltip actions should be set prior to calling the chart’s draw() method. Returns an object containing information about the onscreen placement of the chart and its elements. The color of the vertical gridlines inside the chart area. If set to true, use HTML-rendered (rather than SVG-rendered) tooltips. HAxis property that specifies the title of the horizontal axis.

An object with members to configure the minor gridlines on the vertical axis, similar to the vAxis.gridlines option. The angle of the horizontal axis text, if it’s drawn slanted. Ignored if hAxis.slantedText is false, or is in auto mode, and the chart decided to draw the text horizontally. If the angle is positive, the rotation is counter-clockwise, and if negative, it is clockwise. Overrides the default format for various aspects of date/datetime/timeofday data types when used with chart computed minorGridlines. Five or more columns, where the first column defines X-axis values or group labels,
and each multiple of four data columns after that defines a different series.

  • Whether the chart throws user-based events or reacts to user interaction.
  • When Closing Price is greater than Opening price, the body is filled with white by default and it can be overridden by risingColor property.
  • OHLCSeries accepts data in the form of interface ‘XOHLC’.
  • Replaces the automatically generated X-axis ticks with the specified array.
  • If false, will hide outermost labels rather than allow them to be cropped by the chart container.

Even within markets, price is defined somewhere between bid prices and asking prices. All code and data are processed and rendered in the browser. Returns the pixel x-coordinate of dataValue relative to the left edge of the chart’s container. The color of the chart border, as an HTML color string.

Create a Candlestick Series

Allows formatting for years, months, days, hours, minutes, seconds, and milliseconds. The examples below shows how to create a candlestick chart with the required data formats. Multi Series Candlestick chart are useful when you have to compare two or more data sets, each containing data points representing open, high, low and close values. Candlestick Graphs are mostly used to represent stock price, foreign exchange, commodity, etc.

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