MQL5 ReferenceStandard LibraryMathematicsFuzzy LogicMembership functionsCDifferencTwoSigmoidalMembershipFunctionA1 A1A2C1C2GetValue A1 (Get method) Gets the first membership function slope ratio. double A1() Return Value Slope ratio value. A1 (Set method) Sets the first membership function slope ratio. void A1( const double a1 // slope ratio value ) Parameters a1 [in] Slope ratio value. CDifferencTwoSigmoidalMembershipFunction A2