Hi I was browsing the forums to try and find how what kind of stop order would be best for an hypothetical flash crash, in this case, for the IBKR TWS platform. I'm aware of stop limit orders, but a limit order once the stop is hit is not guaranteed execution if the price dives (or spikes) right through your limit. In a somewhat related thread, @Robert Morse mentioned here "Stop Order with Protection" (on TWS, STP PRT order). The relevant documentation from IBKR illustrates its use for futures, GLOBEX but is somewhat unclear about its use elsewhere. Does anyone knows if "Stop Order with Protection" available for stocks, besides futures? If not and a regular "Stop" order is all one has, what kind of execution would one expect for a market order? Capped to the bid (or ask), or a brokerage would be free to sell it at any price, whatever that might be, regardless of how preposterous? Finally, any of you gentlemen (and ladies) use any specific IBKR TWS algorithm to prioritize execution speed at all costs, even at detriment of price? Many thanks for your time. Regards P.S.: perhaps this should've been posted under the IBKR company specific forum but it was relative to stop orders in general, albeit some IBKR TWS specifics are mentioned. Admins feel free to move it if you feel it would be appropriate.