How to add tooltips to flutter_candlesticks charts?

The package does not natively support tooltips. Developers need to implement custom overlays or consider alternative libraries with interactive features for hover effects on data points, as this is a known limitation.

flutter_candlesticks vs fl_chart for financial charts?

flutter_candlesticks focuses on elegant OHLC and volume charts with simplicity and minimal config, while fl_chart offers a wider range of chart types and interactivity but requires more setup. Choose based on whether you prioritize specialized candlestick visualization or broader, interactive charting capabilities.

Can I change the volume bar colors in flutter_candlesticks?

Yes, customization is possible through the package's styling properties. While specific volume color options aren't detailed, you can adjust overall colors for increasing and decreasing elements, and volume bars likely inherit these styles based on the data.

How to update charts with real-time data in flutter_candlesticks?

Update the 'data' property with new lists and rebuild the widget. However, the package isn't optimized for high-frequency updates, so performance with frequent changes might degrade, and you should test with your specific data flow.

What data format does flutter_candlesticks require?

It requires a list of maps with keys 'open', 'high', 'low', 'close', and 'volumeto', as shown in the example. Ensure your data source provides numeric values in this exact structure for proper rendering.

Is flutter_candlesticks suitable for dark mode apps?

Yes, it works seamlessly with dark themes. You can customize grid line and label colors to match your app's theme, as demonstrated in the dark mode screenshots provided in the README.

Open-Awesome

Candlesticks

MITDart

A Flutter package for rendering elegant OHLC candlestick and trade volume charts with customizable styling.

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429 stars88 forks0 contributors

What is Candlesticks?

flutter_candlesticks is a Flutter package that provides elegant, customizable OHLC candlestick charts and trade volume bars for visualizing financial market data. It solves the problem of displaying complex trading data in a clean, responsive format within Flutter applications, with automatic sizing and theme support.

Target Audience

Flutter developers building financial, trading, or cryptocurrency applications that require professional candlestick chart visualizations.

Value Proposition

Developers choose this package for its simplicity, elegant default styling, and full customization of chart elements without needing to build complex charting logic from scratch.

Overview

Elegant OHLC Candlestick and Trade Volume charts for @Flutter

Use Cases

Best For

Building cryptocurrency trading apps with real-time price charts
Displaying stock market data in Flutter mobile applications
Creating financial dashboards with OHLC and volume visualization
Prototyping trading platforms with customizable chart themes
Adding interactive candlestick charts to investment tracking apps
Visualizing historical market data with clean, responsive charts

Not Ideal For

Applications requiring interactive chart features like zooming, panning, or hover tooltips
Projects that need to display multiple chart types or technical indicators beyond OHLC and volume
High-frequency trading apps with real-time data streaming and dynamic updates

Pros & Cons

Pros

Customizable Styling

Offers full control over colors for candles, grid lines, and labels, seamlessly integrating with both light and dark themes as shown in the screenshot examples.

Dynamic Candle Sizing

Candles automatically resize based on data density, ensuring optimal visualization across different screen sizes, demonstrated in the README's comparison images.

Integrated Volume Bars

Includes proportional trade volume bars below the candlestick chart, providing a complete financial data view without needing separate components.

Simple API

Features a straightforward property-based configuration with minimal setup, as evidenced by the concise usage table and example code snippets.

Cons

No Interactivity

Lacks built-in features for user interaction such as zooming, panning, or tooltips, limiting its use in applications where data exploration is essential.

Basic Charting Capabilities

Only supports OHLC candlesticks and volume bars, missing advanced features like technical indicators, multiple chart overlays, or real-time optimizations.

Sparse Documentation

The README provides basic examples but lacks in-depth tutorials, API references, or guidance for complex scenarios, which may hinder adoption for edge cases.

Frequently Asked Questions

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