# How to choose a trading pair

You can select a trading pair in the **Chart** or **DOM** widgets by clicking on **Choose pair**.

Before doing so, however, you must configure your [connection to the exchange](https://wiki-en-macos.tiger.trade/features/how-to-start/connect-to-exchanges)

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### How does trading pair selection work? <a href="#h_8fb07b0282" id="h_8fb07b0282"></a>

Let’s say you select an instrument, such as spot trading. A connection window will appear. If you have a connection, then, in order for it to be selected automatically and so that the window for selecting a connection doesn’t appear every time, put a checkmark next to “Automatically choose connection next time if there’s only one connection.”

If you have several connections, then when you select the spot instrument, you will see a list of the connections that support spot instruments. If you select the futures instrument, you will only see the connections that support futures.

**Note:** For your convenience, the system is configured such that the instrument is automatically updated in the trading toolbar for the widget you selected.