REP, which stands for Augur (a decentralized prediction market platform), can be traded on various cryptocurrency exchanges. Some popular exchanges where you can trade REP include Binance, Coinbase Pro, Kraken, and Bittrex. These exchanges provide a platform for users to buy and sell REP tokens. To trade REP, you would typically need to create an account on one of these exchanges, deposit your desired amount of funds, and then execute buy or sell orders for REP tokens based on the current market price. It is important to choose a reputable exchange and follow proper security measures to ensure the safety of your funds.