There are a few steps you’ll need to complete before you can trade on Radar. After the initial set-up, you won't have to repeat every step the next time you trade.
Connect or unlock your wallet
Make sure you have ETH
ETH will be used to pay transaction costs in the next steps. You always need a small amount of ETH in your wallet to use Radar.
Enable your base tokens ETH and/or DAI to make trades. ZRX must also be enabled to pay relayer fees. Radar Relay currently has no fees but ZRX must still be enabled.
To trade for alt. tokens, you will need to wrap your ETH. Make sure to leave some ETH unwrapped in order to pay transaction fees.