A Stop Limit order rests in the same way as a Stop order.
However, once triggered, rather than execute at the next available price it converts to a Limit order at a pre-agreed price.
From that point on, the order is treated as a Limit order.
This type of order gives the trader some protection from a fill much
worse than the stop price in a gapping or illiquid market.
However, that protection comes at a cost. In some circumstances, the order may not be executed at all.