Watermark

Lightweight Charts™ has a built-in feature for displaying simple text watermarks on your chart. This example shows how to configure and add this simple text watermark to your chart. If you are looking to add a more complex watermark then have a look at the advanced watermark example included below.

Short answer

A simple text watermark can be configured and added by specifying the watermark property within the chart options as follows:

chart.applyOptions({
    watermark: {
        visible: true,
        fontSize: 24,
        horzAlign: 'center',
        vertAlign: 'center',
        color: 'rgba(171, 71, 188, 0.5)',
        text: 'Watermark Example',
    },
});

The options available for the watermark are: Watermark Options.

To have the watermark appear, you need to set visible to true and ensure that the text property isn't empty.

You can see full working examples below.

Resources

• Watermark Options

Examples

How to use the code sample

The code presented below requires:

• That createChart has already been imported. See Getting Started for more information,
• and that there is an html div element on the page with an id of container.

Here is an example skeleton setup: Code Sandbox. You can paste the provided code below the // REPLACE EVERYTHING BELOW HERE comment.

tip

Some code may be hidden to improve readability. Toggle the checkbox above the code block to reveal all the code.

Simple Watermark Example

 

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// Lightweight Charts™ Example: Watermark Simple
// https://tradingview.github.io/lightweight-charts/tutorials/how_to/watermark

const chartOptions = {
    layout: {
        textColor: 'black',
        background: { type: 'solid', color: 'white' },
    },
};
/** @type {import('lightweight-charts').IChartApi} */
const chart = createChart(document.getElementById('container'), chartOptions);

chart.applyOptions({
    watermark: {
        visible: true,
        fontSize: 24,
        horzAlign: 'center',
        vertAlign: 'center',
        color: 'rgba(171, 71, 188, 0.5)',
        text: 'Watermark Example',
    },
});

const lineSeries = chart.addAreaSeries({
    topColor: '#2962FF',
    bottomColor: 'rgba(41, 98, 255, 0.28)',
    lineColor: '#2962FF',
    lineWidth: 2,
});

const data = [
    { value: 0, time: 1642425322 },
    { value: 8, time: 1642511722 },
    { value: 10, time: 1642598122 },
    { value: 20, time: 1642684522 },
    { value: 3, time: 1642770922 },
    { value: 43, time: 1642857322 },
    { value: 41, time: 1642943722 },
    { value: 43, time: 1643030122 },
    { value: 56, time: 1643116522 },
    { value: 46, time: 1643202922 },
];

lineSeries.setData(data);

chart.timeScale().fitContent();

Advanced Watermark Example

If a simple text watermark doesn't meet your requirements then you can use the following tips to rather create your own custom watermark using html and css.

We will first set the background color of the chart to transparent so that we can place our custom watermark underneath the chart and still see it.

chart.applyOptions({
    layout: {
        // set chart background color to transparent so we can see the elements below
        background: { type: 'solid', color: 'transparent' },
    },
});

Next we will create a div element, and attach it as a child of the container element which is holding the chart.

By setting the zIndex value for this div to be negative it will appear beneath the chart.

We will position the div using display: absolute and by setting inset: 0px the div will fill the container.

You can then style the div to meet your specific needs.

const container = document.getElementById('container');
const background = document.createElement('div');
// place below the chart
background.style.zIndex = -1;
background.style.position = 'absolute';
// set size and position to match container
background.style.inset = '0px';
background.style.backgroundImage = `url("data:image/svg+xml;base64,<svg xmlns="http://www.w3.org/2000/svg" width="292" height="128" viewBox="0 0 292 128"><path fill-rule="evenodd" d="m182.93 7.6.63-.37a64.1 64.1 0 0 0 2.43-5.31l4.77-1.39a64.68 64.68 0 0 1-4.72 10.54c.38 10.45-3.93 21.15-11.1 29.37-11.66 13.41-26.98 15.97-43.57 13.78l1.07-.98a21.1 21.1 0 0 0 3.72-4.05 48.37 48.37 0 0 1-11.04 2.84c-10.65-5.54-21.64-14.94-24.27-27.27 9.19-17 28.95-24.01 47.39-19.94a22.57 22.57 0 0 0 5.86 9.02c-.12-1.92-.1-3.84-.1-5.76l.01-1.78c4.8 2.96 9.66 5.85 15.52 5.7 4.08-.1 8.4-1.52 13.4-4.4Zm-22.55 23.28a8.48 8.48 0 0 0-12.45-.33l-7.9-7.26A8.6 8.6 0 0 0 132 12c-6.14 0-10.25 6.63-7.7 12.09l-13.02 12.19c-4.1-4.97-5.68-9.3-6.17-10.94 8.36-13.72 24.46-20.18 40.15-17.07 2.93 6.9 8.38 10.72 14.77 13.96l-.33-1.14c-.74-2.56-1.47-5.1-1.62-7.78 7.05 3.45 14.6 3.35 21.76.31-4.76 7.27-11.13 14.22-19.46 17.26Zm-22.56-4.19 8.03 7.38A8.6 8.6 0 0 0 154 45a8.6 8.6 0 0 0 8.25-10.55c7.99-3.08 14.37-9.38 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4.77 4.9 4.7 4.7 0 0 1-4.77 4.9 4.7 4.7 0 0 1-4.77-4.9ZM154.9 96h-3.52V72h3.52v10.18c.96-1.6 2.78-2.5 4.86-2.5 3.71 0 6.11 2.62 6.11 6.69V96h-3.52v-9.06c0-2.52-1.28-4.06-3.32-4.06-2.34 0-4.13 1.82-4.13 5.25V96Zm24.86-.2v-3.13c-.51.2-1.22.32-1.89.32-1.82 0-2.69-.73-2.69-2.72v-7.13h4.58V80h-4.58v-4.45h-3.52V80h-3.33v3.14h3.33v7.7c0 3.62 2.4 5.32 5.47 5.32 1.1 0 1.92-.13 2.63-.35Zm21.59.58a11.67 11.67 0 0 1-11.75-11.74c0-6.56 5.22-11.74 11.75-11.74 4.45 0 8.22 2.27 10.24 5.76l-3.23 1.85a7.94 7.94 0 0 0-7.01-4 7.96 7.96 0 0 0-7.97 8.13 7.96 7.96 0 0 0 7.97 8.13 7.94 7.94 0 0 0 7-4l3.24 1.85a11.66 11.66 0 0 1-10.24 5.76Zm13.4-.38h3.52v-7.87c0-3.43 1.8-5.25 4.13-5.25 2.05 0 3.33 1.54 3.33 4.06V96h3.52v-9.63c0-4.07-2.4-6.69-6.11-6.69-2.08 0-3.9.9-4.87 2.5V72h-3.52v24Zm25.56.32c-4.38 0-7.7-3.74-7.7-8.32s3.32-8.32 7.7-8.32c2.3 0 4.23 1.18 5.12 2.46V80h3.52v16h-3.52v-2.14a6.38 6.38 0 0 1-5.12 2.46Zm.64-3.2c2.85 0 4.77-2.24 4.77-5.12s-1.92-5.12-4.77-5.12c-2.84 0-4.76 2.24-4.76 5.12s1.91 5.12 4.76 5.12ZM253.71 96h3.52v-7.8c0-3.2 1.83-4.9 3.84-4.9.64 0 1.15.1 1.76.28v-3.61c-.48-.1-.93-.13-1.37-.13a4.5 4.5 0 0 0-4.23 3V80h-3.52v16Zm21.73-3.33v3.14c-.7.22-1.54.35-2.63.35-3.07 0-5.47-1.7-5.47-5.31v-7.71h-3.33V80h3.33v-4.45h3.52V80h4.58v3.14h-4.58v7.13c0 1.99.86 2.72 2.69 2.72.67 0 1.37-.13 1.89-.32Zm14.21-1.31c0-2.62-1.66-4.03-4.48-4.86l-1.63-.48c-1.57-.45-1.92-1.12-1.92-1.9 0-.95 1.09-1.5 2.15-1.5 1.3 0 2.33.64 3.04 1.64l2.43-1.86c-1.12-1.76-3.01-2.72-5.41-2.72-3.2 0-5.7 1.73-5.73 4.58-.03 2.36 1.41 4.12 4.2 4.9l1.4.38c1.92.57 2.47 1.12 2.47 2.04 0 1.12-1.06 1.7-2.3 1.7-1.64 0-3.2-.8-3.85-2.2l-2.59 1.85c1.15 2.27 3.58 3.39 6.43 3.39 3.3 0 5.8-1.89 5.8-4.96Zm-143.38 21.4c0 .46-.37.84-.83.84a.86.86 0 0 1-.87-.85c0-.46.39-.85.87-.85.46 0 .83.39.83.85Zm-.29 11.24h-1.12v-8h1.12v8Zm-52.02.16a4.04 4.04 0 0 0 3.98-4.16 4.04 4.04 0 0 0-3.98-4.16c-1.24 0-2.39.64-2.96 1.5V112h-1.12v12H91v-1.34c.57.86 1.72 1.5 2.96 1.5Zm-.12-1.04c-1.74 0-2.94-1.4-2.94-3.12 0-1.73 1.2-3.12 2.94-3.12 1.75 0 2.95 1.4 2.95 3.12 0 1.73-1.2 3.12-2.95 3.12Zm7.9 4.22 5.3-11.34h-1.26l-2.93 6.35-2.93-6.35h-1.24l3.55 7.6-1.76 3.74h1.26ZM115.3 124h-1.2v-10.2h-3.68v-1.16h8.56v1.15h-3.68V124Zm3.82 0h1.12v-4.02c0-2.04 1.23-2.94 2.22-2.94.24 0 .45.03.67.11v-1.17a2.44 2.44 0 0 0-2.9 1.66V116h-1.11v8Zm11.72-1.34a3.64 3.64 0 0 1-2.96 1.5 4.04 4.04 0 0 1-3.98-4.16 4.04 4.04 0 0 1 3.98-4.16c1.23 0 2.39.64 2.96 1.5V116h1.12v8h-1.12v-1.34Zm-5.8-2.66c0 1.73 1.2 3.12 2.95 3.12 1.75 0 2.95-1.4 2.95-3.12 0-1.73-1.2-3.12-2.95-3.12-1.74 0-2.94 1.4-2.94 3.12Zm12.98 4.16c1.23 0 2.39-.64 2.96-1.5V124h1.12v-12H141v5.34a3.64 3.64 0 0 0-2.96-1.5 4.04 4.04 0 0 0-3.98 4.16 4.04 4.04 0 0 0 3.98 4.16Zm.11-1.04c-1.74 0-2.94-1.4-2.94-3.12 0-1.73 1.2-3.12 2.94-3.12 1.75 0 2.95 1.4 2.95 3.12 0 1.73-1.2 3.12-2.95 3.12Zm10.6.88h1.11v-3.98c0-1.99 1.1-3.14 2.5-3.14 1.19 0 2.02.86 2.02 2.27V124h1.12v-5c0-1.96-1.27-3.16-3.01-3.16-1.04 0-2.05.45-2.63 1.5V116h-1.11v8Zm16.71-.42c0 2.61-1.72 3.92-3.95 3.92-1.84 0-3.17-.83-3.77-1.74l.88-.75a3.4 3.4 0 0 0 2.9 1.45c1.37 0 2.82-.83 2.82-2.94v-1.02c-.57.86-1.7 1.5-2.92 1.5a3.94 3.94 0 0 1-3.96-4.08 3.94 3.94 0 0 1 3.96-4.08c1.23 0 2.35.64 2.92 1.5V116h1.12v7.58Zm-6.84-3.66c0 1.73 1.16 3.04 2.9 3.04 1.75 0 2.92-1.31 2.92-3.04s-1.17-3.04-2.91-3.04c-1.75 0-2.91 1.31-2.91 3.04Zm13.55 4.08 4.88-11.36h-1.35l-4.03 9.38-4.03-9.38h-1.36l4.9 11.36h.99Zm7.84-11.25c0 .47-.37.85-.83.85a.86.86 0 0 1-.86-.85c0-.46.38-.85.86-.85.47 0 .83.39.83.85Zm-.28 11.25h-1.13v-8h1.13v8Zm6.2.16a3.9 3.9 0 0 0 3.56-1.95l-.91-.6a2.78 2.78 0 0 1-2.64 1.51 2.87 2.87 0 0 1-2.96-2.93h6.75v-.3c-.02-2.56-1.68-4.05-3.76-4.05a4.05 4.05 0 0 0-4.15 4.16c0 2.3 1.6 4.16 4.12 4.16Zm-.01-7.28c1.34 0 2.45.88 2.64 2.32h-5.49a2.84 2.84 0 0 1 2.85-2.32Zm13.55 7.12h-.93l-2.1-6.1-2.14 6.1h-.92l-2.74-8h1.15l2.08 6.08 2.11-6.08h.87l2.11 6.08 2.08-6.08h1.17l-2.74 8Z" fill="currentColor"></path></svg>")`;
background.style.backgroundRepeat = 'no-repeat';
background.style.backgroundPosition = 'center';
background.style.opacity = '0.5';
container.appendChild(background);

 

Show all code

// Lightweight Charts™ Example: Watermark Advanced
// https://tradingview.github.io/lightweight-charts/tutorials/how_to/watermark

const chartOptions = {
    layout: {
        textColor: 'black',
        // set chart background color to transparent so we can see the elements below
        background: { type: 'solid', color: 'transparent' },
    },
};
/** @type {import('lightweight-charts').IChartApi} */
const chart = createChart(document.getElementById('container'), chartOptions);

const container = document.getElementById('container');
const background = document.createElement('div');
// place below the chart
background.style.zIndex = -1;
background.style.position = 'absolute';
// set size and position to match container
background.style.inset = '0px';
background.style.backgroundImage = `url("data:image/svg+xml;base64,<svg xmlns="http://www.w3.org/2000/svg" width="292" height="128" viewBox="0 0 292 128"><path fill-rule="evenodd" d="m182.93 7.6.63-.37a64.1 64.1 0 0 0 2.43-5.31l4.77-1.39a64.68 64.68 0 0 1-4.72 10.54c.38 10.45-3.93 21.15-11.1 29.37-11.66 13.41-26.98 15.97-43.57 13.78l1.07-.98a21.1 21.1 0 0 0 3.72-4.05 48.37 48.37 0 0 1-11.04 2.84c-10.65-5.54-21.64-14.94-24.27-27.27 9.19-17 28.95-24.01 47.39-19.94a22.57 22.57 0 0 0 5.86 9.02c-.12-1.92-.1-3.84-.1-5.76l.01-1.78c4.8 2.96 9.66 5.85 15.52 5.7 4.08-.1 8.4-1.52 13.4-4.4Zm-22.55 23.28a8.48 8.48 0 0 0-12.45-.33l-7.9-7.26A8.6 8.6 0 0 0 132 12c-6.14 0-10.25 6.63-7.7 12.09l-13.02 12.19c-4.1-4.97-5.68-9.3-6.17-10.94 8.36-13.72 24.46-20.18 40.15-17.07 2.93 6.9 8.38 10.72 14.77 13.96l-.33-1.14c-.74-2.56-1.47-5.1-1.62-7.78 7.05 3.45 14.6 3.35 21.76.31-4.76 7.27-11.13 14.22-19.46 17.26Zm-22.56-4.19 8.03 7.38A8.6 8.6 0 0 0 154 45a8.6 8.6 0 0 0 8.25-10.55c7.99-3.08 14.37-9.38 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