To trade BTC with another currency pair on the Binance platform, you can follow these steps:

1. Log into your Binance account:

Open the Binance app or website.

Log into your account using your username and password.

2. Choose the currency pair:

From the homepage, go to "Trading" or "Trade."

Select "Markets" and choose the market you want, such as BTC/USDT or BTC/ETH.

You can also search for the pair in the search bar at the top of the screen.

3. Make a purchase or sale:

After selecting the desired pair, a screen will appear for you to execute the buy or sell order.

Choose the type of order: Limit, Market, or Stop-Limit.

Limit: Allows you to set the buy or sell price.

Market: Allows you to execute the trade at the current market price.