Stop Limit is an advanced order type. It is a limit order with an additional trigger (stop) price. This order is hidden from the order book until the market price passes the trigger (stop) price in the order.
Use this order type to prevent your position from getting liquidated.
DISCLAIMER: The STOP-LIMIT order is stored and triggered from the Finn Exchange server. Opening a STOP-LIMIT order implies trusting that Finn Exchange will trigger the order as expected.
STOP-LIMIT orders are triggered by the price on Finn Exchange, not the mark price.