Rates In Fx Terms

Key Rates In Fx Terms of function Terminal Payoff in FX Optionrefers to an optional boolean that determines the fx rate associated with the numbers entered in Rates
If omitted, the default is TRUE, which means the fx rate is the same as that defined in the FX element of the caller FX Option.
If set to FALSE. the fx rate is assumed to be the inverse of that in FX.