PineUtility: Computes a differentiable utility score for one asset’s signal vector using a rational exponential form. Formula: f = (Σₖ aₖ·e^(bₖ·sₖ)) / (Σₖ cₖ·e^(dₖ·sₖ))
PortfolioAllocation: Allocates capital into assets based on signal-derived ratios and current unit prices. Solves A·x = b where A is the diagonal price matrix, x is the asset count vector, and b is total asset value vector.