---
id: quote_depth
title: Security Depth
slug: depth
sidebar_position: 5
---

This API is used to obtain the depth data of security.


## SDK

| Language | Link |
|---|---|
| Python | [longport.openapi.quote._quote_context](https://longportapp.github.io/openapi/python/reference_all/#longport.openapi.quote._quote_context) |
| Rust | [longport::<SDKLinks module="quote" klass="QuoteContext" method="depth" />::quote#_quote_context](https://longportapp.github.io/openapi/rust/longport/<SDKLinks module="quote" klass="QuoteContext" method="depth" />/struct.quote.html#method._quote_context) |
| Go | [quote.depth](https://pkg.go.dev/github.com/longportapp/openapi-go/<SDKLinks module="quote" klass="QuoteContext" method="depth" />#quote.depth) |
| Node.js | [quote#QuoteContext](https://longportapp.github.io/openapi/nodejs/classes/quote.html#quotecontext) |

:::info

[Business Command](../../socket/biz-command): `14`

:::

## Request

### Parameters

| Name   | Type   | Required | Description                                                    |
| ------ | ------ | -------- | -------------------------------------------------------------- |
| symbol | string | Yes      | Security code, in `ticker.region` format, for example:`700.HK` |

### Protobuf

```protobuf
message SecurityRequest {
  string symbol = 1;
}
```

### Request Example

```python
# Get Security Depth
# https://open.longportapp.com/docs/quote/pull/depth
# Before running, please visit the "Developers to ensure that the account has the correct quotes authority.
# If you do not have the quotes authority, you can enter "Me - My Quotes - Store" to purchase the authority through the "LongPort" mobile app.
from longport.openapi import QuoteContext, Config

config = Config.from_env()
ctx = QuoteContext(config)

resp = ctx.depth("700.HK")
print(resp)
```

## Response

### Response Properties

| Name        | Type     | Description      |
| ----------- | -------- | ---------------- |
| symbol      | string   | Security code    |
| ask         | object[] | Ask depth        |
| ∟ position  | int32    | Position         |
| ∟ price     | string   | Price            |
| ∟ volume    | int64    | Volume           |
| ∟ order_num | int64    | Number of orders |
| bid         | object[] | Bid depth        |
| ∟ position  | int32    | Position         |
| ∟ price     | string   | Price            |
| ∟ volume    | int64    | Volume           |
| ∟ order_num | int64    | Number of orders |

### Protobuf

```protobuf
message SecurityDepthResponse {
  string symbol = 1;
  repeated Depth ask = 2;
  repeated Depth bid = 3;
}

message Depth {
  int32 position = 1;
  string price = 2;
  int64 volume = 3;
  int64 order_num = 4;
}
```

### Response JSON Example

```json
{
  "symbol": "700.HK",
  "ask": [
    {
      "position": 1,
      "price": "335.000",
      "volume": 500,
      "order_num": 1
    },
    {
      "position": 2,
      "price": "335.200",
      "volume": 400,
      "order_num": 1
    },
    {
      "position": 3,
      "price": "335.400",
      "volume": 500,
      "order_num": 2
    },
    {
      "position": 4,
      "price": "335.600",
      "volume": 1200,
      "order_num": 3
    },
    {
      "position": 5,
      "price": "335.800",
      "volume": 14000,
      "order_num": 8
    }
  ],
  "bid": [
    {
      "position": 1,
      "price": "334.800",
      "volume": 69400,
      "order_num": 13
    },
    {
      "position": 2,
      "price": "334.600",
      "volume": 266600,
      "order_num": 27
    },
    {
      "position": 3,
      "price": "334.400",
      "volume": 61300,
      "order_num": 29
    },
    {
      "position": 4,
      "price": "334.200",
      "volume": 125900,
      "order_num": 31
    },
    {
      "position": 5,
      "price": "334.000",
      "volume": 194600,
      "order_num": 94
    }
  ]
}
```

## Error Code

| Protocol Error Code | Business Error Code | Description        | Troubleshooting Suggestions                                   |
| ------------------- | ------------------- | ------------------ | ------------------------------------------------------------- |
| 3                   | 301600              | Invalid request    | Invalid request parameters or unpacking request failed        |
| 3                   | 301606              | Request rate limit | Reduce the frequency of requests                              |
| 7                   | 301602              | Server error       | Please try again or contact a technician to resolve the issue |
| 7                   | 301600              | Symbol not found   | Check that the requested `symbol` is correct                  |
| 7                   | 301603              | No quotes          | Security no quote                                             |
| 7                   | 301604              | No access          | No access to security quote                                   |