Stop orders will be decommissioned on Exchange Traded Options (ETOs) from 12th December 2015.
Stop orders are triggered if a minimum trade of one lot in the instrument is traded in the market. As option prices are calculated on the underlying stock or futures price so the price can reach the stop price but not be triggered as no one is actually trading at that price (for that strike and expiry). To avoid unexpected trading behaviour, Saxo Capital Markets will be removing all Stop order types (stops and trailing stops) on all ETOs (stock options, futures options and index options) from 12th December 2015. ETOs will then only be tradable using market and limit orders.
After the close (NYSE) on 11th December 2015, existing stop orders on ETOs will be cancelled.