> For the complete documentation index, see [llms.txt](https://help.stockcharts.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.stockcharts.com/data-and-ticker-symbols/data-availability/real-time-data.md). # Real-Time Data We offer real-time data from two sources: exchange real-time data for NYSE/Nasdaq/TSX/LSE and BATS real-time data for NYSE/Nasdaq. Exchange real-time data comes directly from the appropriate exchange. We consider data quotes from those exchanges to be the “official” quotes for each security, and they should be extremely close to real-time values found on other sources. In addition, exchange real-time data contains accurate volume data. We highlight exchange real-time data bars in green. We currently offer exchange real-time data for the NYSE, Nasdaq, TSX, and LSE exchanges. There is an additional charge from the exchanges for their real-time data. The [BATS exchange](https://www.cboe.com/us/equities/) provides BATS real-time data for no additional charge. BATS data is only available for US stocks. For liquid stocks, BATS data is similar to NYSE/Nasdaq data. For thinly traded stocks, BATS data can differ significantly. BATS data quotes don't contain useful volume information, so we do not display volume on BATS charts. We highlight BATS real-time data bars in yellow. [Click here](/data-and-ticker-symbols/data-availability/real-time-data/bats-real-time-data.md) for more information about the BATS real-time data available on our site. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://help.stockcharts.com/data-and-ticker-symbols/data-availability/real-time-data.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.