To create a advanced order you need to click the "Advanced" button on the right panel on the Marketplace page. Advanced orders may consist of a chain of related (nested) orders. Nested orders are triggered and are placed in the order queue only after the higher order in the chain is fully executed. For example, for a limit order you can add a linked stop order and then, after the limit order is fully executed, the stop order will be placed.
In "Advanced" section it is possible to create a Stop Limit order. Such an order when touching the stop price will create a limit order instead of a market one.