PS Actual Span formula: PS = float (max ( Fraction (place_2 ["high"]) - Fraction (place_2 ["low"]), abs ( Fraction (place_2 ["high"]) - Fraction (place_1 ["end"]) ), abs ( Fraction (place_2 ["low"]) - Fraction (place_1 ["end"]) ) )) | | |- |- -| -| | |