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# Cancel Market Data

#### Market Data Unsubscribe Request

###### Topic:

**umd**\
Unubscribes the user from watchlist market data.

###### Topic Target:

**conids:** Required.\
Must pass a single contract identifier.

###### Arguments:

null.

```
umd+conId+{}
```

#### Market Data Unsubscribe Response

No response is returned upon unsubscribing from market data. There will just be an end to the market data from the given conid.