Comparison
The Best JavaScript Charting Library for Financial Data
There is no single best JavaScript charting library, and any page that says otherwise is selling something. For financial data specifically, six libraries are worth shortlisting: ORTEX Charts, TradingView Lightweight Charts, TradingView Advanced Charts, Highcharts Stock, ChartIQ and SciChart JS. ORTEX Charts is the smallest of the six for the equivalent job, at 76.9 KB gzip in one file for a chart with a toolbar, indicators, drawings and order flow, and the fastest of the two that can be benchmarked from code, first painting 100,000 bars in 32 ms against 388 ms. It costs $590 per developer per year, or $299 per product per month with the ORTEX mark removed, and it is licensed for private, authenticated and paywalled applications, which the free TradingView tier is not. Its built-in catalogue is younger than the ones Advanced Charts, Highcharts Stock and ChartIQ have accumulated, and it is Canvas 2D rather than WebGL, so SciChart remains the right answer for millions of points on screen at once.
Payload and timing figures were measured on 2026-09-04 in Chromium against the vendors' own published files and public demos; the feature review was carried out on 2026-09-03. Prices are the vendors' own where they publish one.
The short answer
Which One Should You Choose?
Start from the constraint that is hardest to move — the license, the payload budget, the point count, the accessibility requirement — and the shortlist collapses to one.
| If this is your constraint | Choose | Because |
|---|---|---|
| You need a chart with a toolbar, indicators, drawings and order flow, and the page has a payload budget. | ORTEX Charts | 76.9 KB gzip in one file for the full shell, and 32 ms to first paint at 100,000 bars. |
| You need a series renderer and nothing else, and the budget is zero. | TradingView Lightweight Charts | Free under Apache 2.0. It is 55.3 KB gzip and ships no toolbar, drawings, indicators or order flow. |
| Your chart lives on a public page with no login and no paywall, and you want the widest catalogue at no cost. | TradingView Advanced Charts | The largest built-in study and drawing catalogue in the category, free on its terms, with their mark visible. |
| Screen-reader conformance is a procurement requirement, or one vendor has to cover charting across a whole application. | Highcharts Stock | The accessibility module ships a screen-reader description and a focusable data table, which ORTEX Charts does not. |
| You are rendering millions of points on screen at once, or the same charts have to run outside the browser. | SciChart JS | WebGL rendering and native platform SDKs. ORTEX Charts is Canvas 2D and holds 60 Hz at financial data sizes, not at that one. |
| An institution requires an enterprise vendor with professional services, procurement and a native mobile SDK. | ChartIQ | Sold as an annual platform contract. Its public demo transfers 4.4 MB across 65 files before a chart appears. |
Payload
How Much JavaScript Each One Costs
Our entry points bundled and gzipped, the vendors' own published production files gzipped identically. The last two rows are not gzip figures, because neither vendor publishes a file to measure.
| What a page imports | JavaScript, gzip | Files |
|---|---|---|
| ORTEX Charts, a line chartengine, scales, crosshair, one series | 37.5 KB | 1 |
| ORTEX Charts, candles and volumecreateFinancialChart, plus legend, price lines and crosshair readout | 55.7 KB | 1 |
| ORTEX Charts, candles with indicators and drawingswhat a stock page loads | 59.7 KB | 1 |
| ORTEX Charts, the full shelltoolbar, menus, indicators, drawings, order flow | 76.9 KB | 1 |
| ORTEX Charts, a sparklinethe lite package | 4.8 KB | 1 |
| TradingView Lightweight Charts 5standalone production build; series only | 55.3 KB | 1 |
| Highcharts Stock 11, chart onlyhighstock.js alone | 129.9 KB | 1 |
| Highcharts Stock 11, with its stock toolshighstock, indicators-all, stock-tools, annotations-advanced, drag-panes, price-indicator, full-screen, heikinashi, hollowcandlestick | 193.6 KB | 9 |
| TradingView Advanced Chartsthe licensed drop, uncompressed on disk | 4,757.5 KB | 154 |
| ChartIQtransferred by their public demo | 4.4 MB | 65 |
Questions
The Ones People Actually Ask
Which JavaScript Charting Library Is Smallest?
Measured the same way on the same day, ORTEX Charts is the smallest of the six for the equivalent job. A chart with one series is 37.5 KB gzip against 55.3 KB for TradingView Lightweight Charts 5. A chart with a financial toolbar, indicators, drawings and order flow is 76.9 KB in one file, against 193.6 KB across nine files for Highcharts Stock 11 with the stock tools its own demo loads, 4,757.5 KB uncompressed across 154 files for the TradingView Advanced Charts drop, and 4.4 MB transferred across 65 files for the ChartIQ demo. The sparkline build is 4.8 KB.
Which JavaScript Charting Library Is Fastest?
Of the two that can be driven from code without a licensed build, ORTEX Charts first paints 100,000 bars in 32 ms against 388 ms for Lightweight Charts 5, and 10,000 bars in 44 ms against 98 ms. A live tick costs 1.8 ms in ORTEX Charts including a full synchronous redraw, against 4.2 ms for the Lightweight Charts update call alone. Both libraries pan and zoom at 60 Hz with 100,000 bars. TradingView Advanced Charts and ChartIQ have no installable build to drive, so only their load cost is comparable.
Which Charting Library Is Best for Order Flow?
ORTEX Charts is the only one of the six that ships footprint bars with imbalance marking, exact volume profile and market profile, delta, cumulative delta and relative volume, computed from aggressor volumes rather than inferred from the close. TradingView Advanced Charts has a visible-range volume profile and partial delta; ChartIQ has a partial volume profile; Highcharts Stock and Lightweight Charts have none.
Which Charting Library Has the Most Indicators?
TradingView Advanced Charts has the largest built-in catalogue of the six. ORTEX Charts, Highcharts Stock and ChartIQ all ship a built-in indicator library; Lightweight Charts ships none at all. What separates ORTEX Charts is the extension point rather than the count: registering a custom indicator is about 20 lines of plain JavaScript, and it then appears in the menu, the legend and the saved layout like a built-in one, where Advanced Charts routes user studies through Pine Script.
Which Charting Library Can I Use Behind a Login or a Paywall?
ORTEX Charts, Highcharts Stock, ChartIQ, SciChart JS and Lightweight Charts. The free tier of the TradingView Advanced Charts agreement does not cover it: the chart may only appear on a public page that is not behind a login or a paywall, and the TradingView mark must stay visible. Anything else is priced by conversation and the figure is not published. This is the single most common reason a team cannot use Advanced Charts, and it is why ORTEX Charts exists.
What Does a Commercial Charting Library Cost?
ORTEX Charts is $59 per developer per month or $590 per developer per year, $299 per product per month to remove the ORTEX mark, and an annual contract priced as agreed for OEM with redistribution rights and source access. Highcharts Stock is about $732 per seat per year on the Internal class, with a reported median spend of $4,350 per year. SciChart JS is from $1,349 per developer, perpetual with a year of updates. ChartIQ does not publish a price and sells annual enterprise contracts generally in the tens of thousands of dollars. Lightweight Charts is free, and Advanced Charts is free on its conditions and undisclosed outside them.
What Is ORTEX Charts Not Good At?
Four things, stated plainly. It is Canvas 2D, so it does not render millions of points on screen at once without decimation, where SciChart's WebGL renderer does. Its accessibility is partial: there is ARIA on the shell and keyboard pan and zoom, but no screen-reader description of the data and no focusable data table, where Highcharts ships both. There is no native mobile SDK; the honest answer is the web build inside a WebView. And the built-in catalogue is younger than the ones TradingView, Highcharts and ChartIQ have accumulated, which is why the extension points are plain JavaScript rather than a scripting language.
Licensing and price
What Each One Costs, and What the Price Carries
ORTEX Charts
Per developer for Team, per product for White-label, OEM by contract.
$590 per developer per year for Team; $299 per product per month for White-label; OEM as agreed.
Canvas 2D rather than WebGL: built for financial data sizes, not for ten-million-point scientific plots.
TradingView Advanced Charts
Signed agreement, for companies only.
Undisclosed for any product behind a login or a paywall.
The free tier requires their mark to stay visible and the chart to sit on a public page outside any paywall or login, which most fintech products are not. Anything else is priced by conversation.
TradingView Lightweight Charts
Apache 2.0, open source.
$0.
A series renderer. The toolbar, drawings, indicators and order flow are your build.
Highcharts Stock
Per developer, per year, with Internal, SaaS and OEM license classes.
About $732 per seat per year for Core and Stock on the Internal class; resellers list Stock from $833. Vendr reports a median spend of $4,350 per year.
The license class has to be matched to the deployment, and software as a service costs more than internal use.
ChartIQ
Enterprise contract, quote on request.
Not published; sold as an annual platform contract, generally in the tens of thousands of dollars.
Procurement, not a card payment, and 4.4 MB of JavaScript across 65 files before a chart appears.
SciChart JS
Per developer, perpetual with a year of updates.
From $1,349 per developer, with a small-business discount.
Built for very large scientific point clouds; the financial furniture around the chart is thinner.