> ## Documentation Index
> Fetch the complete documentation index at: https://alltick.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# K-Line Push (Not Supported)

> Learn K-Line Push (Not Supported) for AllTick WebSocket API, including connection setup, subscription messages, real-time quote streaming and request examples.

## K-Line Push Description

**AllTick WebSocket interfaces do not support K-line data push.** Because many customers have questions about this, this document explains that both historical K-lines and real-time K-lines are currently supported only through direct HTTP interface retrieval. The recommended implementation is as follows:

**Implementation suggestions (for reference only):**

**1. Periodically pull K-lines**: To quickly update K-lines, **it is recommended to purchase a plan with a higher request frequency to increase the pull frequency.**

**2. Use HTTP interfaces together**: We recommend using `/kline` and `/batch-kline` together as follows:

* First, use the `/kline` interface to poll historical data and store it in a local database. Later historical data can be obtained directly from the customer's database without requesting the interface again.
* Then, continuously use the `/batch-kline` interface to batch request the latest two K-lines for multiple products and update the database with the data.

This approach can quickly update the latest K-lines while avoiding request frequency restrictions caused by frequent historical K-line requests.

## Price Change Description

**AllTick interfaces do not provide a price change or 24-hour price change field.** Customers can calculate price changes themselves by obtaining AllTick data.

**1. Daily price change calculation methods**:

* **Method 1**: Use the HTTP interface to obtain today's daily K-line closing price and the previous day's daily K-line closing price. The formula is:

Price change = (today's closing price - previous day's closing price) / previous day's closing price \* 100%

* **Method 2**: Use the WebSocket interface to obtain the latest price, and use the HTTP interface to obtain today's daily K-line closing price. The formula is:

Price change = (latest price - previous day's closing price) / previous day's closing price \* 100%

**2. 24-hour price change calculation method**:

* Use the WebSocket latest trade price interface (request protocol number: 22004) to receive tick-by-tick trade prices in real time.
* You need to store the latest price from 24 hours ago pushed by the WebSocket interface for subsequent calculation.
* Formula:

24-hour price change = (latest price - latest price 24 hours ago) / latest price 24 hours ago \* 100%

#### AllTick Website

<Note>
  Official website: <a href="https://alltick.co/">[https://alltick.co/](https://alltick.co/)</a>
</Note>

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