Limit Order - Marketable limit order that can generate and discover liquidity and price improvement at PDQ.

Market Order - This order is the same as the commonly known type and can be improved by PDQ just like a Limit Order.

Immediate or Cancel at PDQ - A liquidity seeking order whose unmatched residual will be cancelled if not matched at PDQ within 20 milliseconds.

Fill Or Kill at PDQ - A liquidity seeking order that is filled in its entirety within 20 milliseconds at PDQ or cancelled.

Managed Order - A liquidity seeking order that will reside at PDQ and interact with other liquidity seeking flow as a Liquidity Provider.