The valuation of Stop Loss Turbos is very simple, that's the difference between the underlying price and the reference level of the Stop  Loss Turbos.  Contrary to other options categories, the value Stop Loss Turbos is insenstive to variations of the volatility or to the proximity of the maturity date.

The capital protection in case of unfavorable evolution of the underlying price, that is if the underlying price hits or exceeds the security barrier associated with the Stop Loss Turbo.  In this case indeed, the Stop  Loss turbo is automatically deactivated and its payoff is paid on the day after on your account.

The Security barrier works during normal trading hours for the underlying on its reference market, that is from 9 AM  to 5.30 PM for most European values and from  3.30 PM  to 10 PM for american values.It is worth noting that the payoff value may be inferior to the security threshold in case of quotation "gap".  By any means, it can't be negative nor imply margin calls, you risk always remain limited to the invested prime.