---
# System prepended metadata

title: Issues

---

### Trading APP Charts Data

- InitialData from back-end from WS every 500ms

{
      time: dayStartTime, // The WS request time,
      open: openPrice,
      high: highPrice,
      low: lowPrice,
      close: closePrice,
      value: openPrice + closePrice / 2,
    }
    
```
Example: [
    {
        "time": 12345678,
        "open": 12700,
        heigh: 12700,
        low: 12626.2,
        colse: 12670.5,
        value: 423
    }
];
``` 

- Storaging `previous_data` from database to present the data from past history and storing it in the datbase
- 
- presenting live data will be merging previous_data with the new data will come ws in front-end side
