question: public double gaussianPotentialUpside ( double percentile ) { QL . require ( percentile < 1.0 && percentile >= 0.9 , "percentile is out of range [0.9, 1)" ) ; double result = gaussianPercentile ( percentile ) ; return Math . max ( result , 0.0 ) ; }
target:  percentile must be in range [90%-100%)