# K-line push (not supported)

English / [中文](https://app.gitbook.com/s/AnPIgTqJ2rek1QSPVUja/websocket-api/stock-websocket-interface-api/ping-pong-1)

## K-line Push Explanation

Alltick's WebSocket interface does not support K-line data push. Both historical and real-time K-lines can only be accessed through the HTTP interface. Recommended implementation methods are as follows:

**Implementation Suggestions (for reference):**

**1、Periodic K-line Retrieval:** To ensure quick updates, consider purchasing a high-frequency request plan.

**2、Combine HTTP Interfaces:** It is recommended to use both `/kline` and `/batch-kline` interfaces as follows:

* First, use the `/kline` interface to poll and store historical data in a local database. Subsequent historical data can be retrieved directly from the database without additional requests.
* Then, continuously use the `/batch-kline` interface to request the latest two K-lines for multiple products and update the database.

This method allows for quick updates of the latest K-lines while avoiding limitations from frequent historical requests.

### Price Change Calculation <a href="#interface-limitations" id="interface-limitations"></a>

**Alltick API does not provide price change or 24-hour price change fields.** Users can calculate price changes using Alltick data.

**1、Daily Price Change Calculation：**

**Method 1:** Use the HTTP API to get the daily K-line closing price for today and the previous day.

**Formula:** `Price Change (%) = (Today's Closing Price - Previous Day's Closing Price) / Previous Day's Closing Price * 100%`

**Method 2:** Use the WebSocket API to get the latest price and the HTTP API to fetch the previous day's closing price.

**Formula:** `Price Change (%) = (Latest Price - Previous Day's Closing Price) / Previous Day's Closing Price * 100%`

**2、24-Hour Price Change Calculation：**

Use the WebSocket trade price API (Request Protocol: 22004) to receive real-time tick data.

To calculate, store the latest price from 24 hours ago and use the following formula:

**Formula:** `24H Price Change (%) = (Latest Price - Price 24 Hours Ago) / Price 24 Hours Ago * 100%`

### Official Website

{% hint style="info" %}
Official website: <https://alltick.co/>
{% endhint %}