There are over 200 currency pairs available on Rain for you to trade with. You can trade Optimism with Bahraini dinar, Kuwaiti dinar, Emirati dirham, Omani rial or US dollar, depending on your location. Additionally, you can swap Optimism with 40 other assets like BTC, LTC, XRP, ETH. You can explore your options by visiting the market page on your Rain account: https://www.rain.com/market