Liquidity is essential for the efficient operation of any market, as it ensures accurate pricing of the traded asset and depth in matching buys with sells. In order to provide the most efficient trading infrastructure Zeta will use a hybrid approach, leveraging the orderbook for deep liquidity and the OMM to underpin market participation. We seamlessly integrate the two into a platform where users can trade against one another, but can also fall back to orders placed by the OMM when an active counterparty to trade with isn't available.