1. Please make sure your wallet is using the Arbitrum One network and it's connecting to MCDEX.
2. When you trade on MCDEX, a portion of your transaction fee (based on the mining rebate rate) will be rebated as trading mining rewards and airdropped daily to your wallet.
You can find pools that are valid for trading mining in the section indicated on the image.
3. Click a perpetual contract you want to trade with and go to the trading page.
4. Complete a transaction on the trading page (long or short are both okay).
5. Back to the transaction mining page, the system will automatically count your transaction data. The rewards will be airdropped daily to your wallet.