Market Orders specify a quantity and are filled instantly at the market price, the best possible price on the order book. Swaps are effectively Market orders. These orders pay the taker fee.
Limit Orders specify a price and a quantity and are filled if the market price crosses the limit price. There is no maker fee on Rubicon, so a Limit Order that
makes liquidity on the book pays no fees other than gas.
You can manage and cancel outstanding orders under the Open Orders tab on Trade (opens in a new tab) in the App.
More order types are currently under development, join our Discord (opens in a new tab) and let us know what types you want to see!