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title: "Data Streams Candlestick API Reference | Chainlink Documentation"
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description: "Reference for the Chainlink Data Streams Candlestick API. Learn how to authenticate, list available symbols, query historical candlestick (OHLC) data, and stream live price updates over HTTP."
The Candlestick API is designed and implemented to satisfy [TradingView data integration specifications](https://www.tradingview.com/broker-api-docs/rest-api-spec/#tag/Data-Integration), the industry standard for sharing open-high-low-close (OHLC) aggregated trading data.
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The Candlestick API provides open-high-low-close (OHLC) aggregated trading data.
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OHLC data is provided in two formats: [the standard OHLCV format](#get-candlestick-data-row-format), widely used by retail crypto exchanges, ideal for human readability and compatibility; [and the columnar format](#get-candlestick-data-column-format), preferred by HFT systems, optimized for efficient, large-scale data processing.
|**Authentication**|[HMAC Signature](/data-streams/reference/data-streams-api/authentication) (automatic with SDKs) |[JWT](/data-streams/reference/candlestick-api#authorize-and-get-token) (token-based) |
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## Data Streams API
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The [Data Streams API](/data-streams/reference/data-streams-api) provides cryptographically signed, verifiable data reports designed for **onchain** consumption by smart contracts. This comprehensive solution offers multiple integration paths to support applications that require low-latency, tamper-proof data.
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The [Data Streams API](/data-streams/reference/data-streams-api) provides cryptographically signed, verifiable data reports that can be used for onchain consumption by smart contracts. This comprehensive solution offers multiple integration paths to support applications that require low-latency, tamper-proof data.
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### Integration Methods
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## Candlestick API
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The [Candlestick API](/data-streams/reference/candlestick-api) provides historical and real-time OHLC (Open-High-Low-Close) data designed for **offchain** applications. Built to TradingView data integration specifications, it's optimized for analytics, charting, and dashboard applications.
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The [Candlestick API](/data-streams/reference/candlestick-api) provides historical and real-time OHLC (Open-High-Low-Close) data designed for offchain applications. Optimized for analytics, charting, and dashboard applications.
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