Unlike other platforms, you don't need to transfer any balance to Bottrex, your balance should be on your own exchange, in the base currency you will trade (USDT or BTC). Exchanges that are integrated with Bottrex provide an API, which facilitates communication between the two platforms. You will need to create an API key on your exchange with the necessary permissions to trade, then save the two keys (secret and key) on your Bottrex robot (see the full tutorials at this link). This way the robot will be authorized to trade cryptocurrencies directly in your account.