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

# Order Entry — Close Position

Closing a position is performed over **WebSocket**.\
This command instructs the engine to place a `LIMIT IOC` order on the **opposite side** of your current position, pegged near the mark price to maximise the chance of a complete close-out.\
The engine automatically sizes the order to match your open position, so you always close in full.

* **Endpoint:** `wss://trade.qfex.com?api_key=YOUR_API_KEY`
* **Authenticate within 1 minute of connecting.**

## 1) Authenticate

Send this immediately after you connect:

```json theme={null}
{ "type": "auth", "params": { "hmac": { "public_key": "qfex_pub_xxxxx", "nonce": "c0ffee...", "unix_ts": 1760545414, "signature": "5f2e..." } } }
```

## 2) Close a Position

```json theme={null}
{
  "type": "close_position",
  "params": {
    "symbol": "AAPL-USD"
  }
}
```

## Parameters

| Field    | Type   | Required | Description                                                       |
| -------- | ------ | -------- | ----------------------------------------------------------------- |
| `symbol` | string | ✅        | Market symbol whose position you want to close (e.g. `AAPL-USD`). |

> ⚠️ Notes:
>
> * The generated order is always `LIMIT` + `IOC`, reduce-only, and inherits the appropriate closing side.
> * Subscribe to [`fills`](/websocket/channels/trade/fills) to receive executions.
> * Subscribe to [`order_responses`](/websocket/channels/trade/order) to receive final status updates.

## Sample Code

<CodeGroup>
  ```python python theme={null}
  # Python (websocket-client)
  # pip install websocket-client
  import json
  import websocket

  API_KEY = "YOUR_API_KEY"


  def send(ws, obj):
      ws.send(json.dumps(obj))


  def on_open(ws):
      # 1) Authenticate
      # https://docs.qfex.com/websocket/channels/trade/authenticate#how-it-works
      send(ws, {"type": "auth", "params": { "hmac": { "public_key": "qfex_pub_xxxxx", "nonce": "c0ffee...", "unix_ts": 1760545414, "signature": "5f2e..." }}})

      # 2) Close position
      send(ws, {
          "type": "close_position",
          "params": {
              "symbol": "AAPL-USD",
          },
      })


  ws = websocket.WebSocketApp(
      "wss://trade.qfex.com?api_key=YOUR_API_KEY",
      on_open=on_open,
      on_message=lambda _, m: print(m),
      on_error=lambda _, e: print("Error:", e),
      on_close=lambda *_: print("Closed"),
  )
  ws.run_forever()
  ```

  ```javascript node theme={null}
  // Node.js (ws)
  // npm i ws
  const WebSocket = require("ws");

  const API_KEY = "YOUR_API_KEY";
  const ws = new WebSocket("wss://trade.qfex.com?api_key=YOUR_API_KEY");

  ws.on("open", () => {
    // 1) Authenticate
    ws.send(JSON.stringify({ type: "auth", params: { api_key: API_KEY } }));

    // 2) Close position
    ws.send(
      JSON.stringify({
        type: "close_position",
        params: {
          symbol: "AAPL-USD",
        },
      })
    );
  });

  ws.on("message", (m) => console.log(m.toString()));
  ws.on("error", (e) => console.error("WS error:", e));
  ws.on("close", (code, reason) =>
    console.log("Closed:", code, reason?.toString())
  );
  ```

  ```go go theme={null}
  // Go (gorilla/websocket)
  // go get github.com/gorilla/websocket
  package main

  import (
  	"log"

  	"github.com/gorilla/websocket"
  )

  func mustWriteJSON(c *websocket.Conn, v any) {
  	if err := c.WriteJSON(v); err != nil {
  		log.Fatal("write:", err)
  	}
  }

  func main() {
  	c, _, err := websocket.DefaultDialer.Dial("wss://trade.qfex.com?api_key=YOUR_API_KEY", nil)
  	if err != nil {
  		log.Fatal("dial:", err)
  	}
  	defer c.Close()

  	// 1) Authenticate
  	mustWriteJSON(c, map[string]any{
  		"type": "auth",
  		"params": map[string]any{"hmac": map[string]any{"public_key": "qfex_pub_xxxxx", "nonce": "c0ffee...", "unix_ts": 1760545414, "signature": "5f2e..."}}
  	})

  	// 2) Close position
  	mustWriteJSON(c, map[string]any{
  		"type": "close_position",
  		"params": map[string]any{
  			"symbol": "AAPL-USD",
  		},
  	})
  }
  ```

  ```java java theme={null}
  // Java (OkHttp WebSocket)
  // Gradle: implementation("com.squareup.okhttp3:okhttp:4.12.0")
  import java.util.concurrent.TimeUnit;
  import okhttp3.*;

  public class ClosePositionWs {
    public static void main(String[] args) {
      OkHttpClient client = new OkHttpClient.Builder()
          .pingInterval(20, TimeUnit.SECONDS)
          .build();

      Request req = new Request.Builder()
          .url("wss://trade.qfex.com?api_key=YOUR_API_KEY")
          .build();

      WebSocketListener li = new WebSocketListener() {
        @Override public void onOpen(WebSocket ws, Response r) {
          // 1) Authenticate
          ws.send("{\"type\": \"auth\", \"params\": { \"hmac\": { \"public_key\": \"qfex_pub_xxxxx\", \"nonce\": \"c0ffee...\..\", \"unix_ts\": 1760545414, \"signature\": \"5f2e...\" }}}");

          // 2) Close position
          ws.send("{\"type\":\"close_position\",\"params\":{\"symbol\":\"AAPL-USD\"}}");
        }

        @Override public void onMessage(WebSocket ws, String text) {
          System.out.println(text);
        }

        @Override public void onFailure(WebSocket ws, Throwable t, Response r) {
          System.err.println("WS error: " + t.getMessage());
        }
      };

      client.newWebSocket(req, li);

      try { Thread.sleep(Long.MAX_VALUE); } catch (InterruptedException ignored) {}
    }
  }
  ```
</CodeGroup>

## Example Responses

You will receive an `order_response` acknowledgement immediately, followed by fill updates (if any).

```json theme={null}
{
  "order_response": {
    "order_id": "5b309929-206f-40ec-804d-cbe46e81afc1",
    "symbol": "AAPL-USD",
    "status": "ACK",
    "quantity": 2.0,
    "price": 199.8,
    "take_profit": 0.0,
    "stop_loss": 0.0,
    "side": "SELL",
    "type": "LIMIT",
    "time_in_force": "IOC",
    "user_id": "0020ce8e-eaee-480e-8d7f-b9241d756ee5",
    "client_order_id": "",
    "quantity_remaining": 2.0
  }
}
```

```json theme={null}
{
  "order_response": {
    "order_id": "5b309929-206f-40ec-804d-cbe46e81afc1",
    "symbol": "AAPL-USD",
    "status": "FILLED",
    "quantity": 2.0,
    "price": 199.75,
    "take_profit": 0.0,
    "stop_loss": 0.0,
    "side": "SELL",
    "type": "LIMIT",
    "time_in_force": "IOC",
    "user_id": "0020ce8e-eaee-480e-8d7f-b9241d756ee5",
    "client_order_id": "",
    "quantity_remaining": 0.0
  }
}
```

<Note>
  Any unfilled remainder is cancelled automatically because the engine always
  uses `IOC`. If you have no open position for the symbol, the command is
  rejected.
</Note>