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

> ## Agent Instructions
> API requests use the base URL https://api.unusualwhales.com and require a bearer token in the `Authorization` header (`Authorization: Bearer <API_KEY>`). Create and manage API tokens at https://unusualwhales.com/dashboard/api.
> For live market data inside an AI tool, use the Unusual Whales MCP server at https://unusualwhales.com/public-api/mcp.
> Instructions for agents using Unusual Whales tools: https://unusualwhales.com/skill.md

# trade-cancels

> Cancellations of previously reported stock and option trades

Topic
messages**2**
routing**message key**
encoding**protobuf**

## Messages on this topic

[option-trade
OptionTradeCancel
An option trade cancellation referencing a previously executed trade.
4 fields→](/docs/kafka/types/OptionTradeCancel.md)

[stock-trade
TradeCancel
A stock trade cancellation referencing a previously reported trade.
13 fields→](/docs/kafka/types/TradeCancel.md)

The message type is determined by the Kafka message key.

## Consume the topic

```python Python theme={null}
from confluent_kafka import Consumer
from unusualwhales.schema_pb2 import OptionTradeCancel, TradeCancel

# The record key selects the message type.
BY_KEY = {
    b"option-trade": OptionTradeCancel,
    b"stock-trade": TradeCancel,
}

# CONFIG comes from the Connecting section of the Kafka overview.
consumer = Consumer(CONFIG | {"group.id": "my-trade-cancels-consumer"})
consumer.subscribe(["trade-cancels"])

while True:
    msg = consumer.poll(1.0)
    if msg is None or msg.error():
        continue

    message_type = BY_KEY.get(msg.key())
    if message_type is None:
        continue

    event = message_type()
    event.ParseFromString(msg.value())
    print(event)
```