【NormalDensity】
[code]Inputs: PriceValue(Numeric), Mean(Numeric), VStd(Numeric);Variable: var0(3.141593);
If VStd <> 0 then
NormalDensity = (1 / (SquareRoot(2 * var0)* VStd))* ExpValue(-Square(PriceValue - Mean)/(2 * Square(VStd)));
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