double index = xy.get(0).doubleValue();
            double confidencePercentage = xy.get(1).doubleValue();

            if (Math.abs(confidencePercentage) >= THRESHOLD) {
                return new BackgroundColor(index, redComponent(confidencePercentage), greenComponent(confidencePercentage), opacity(confidencePercentage));
            } else {
                return null;
            }
        }

    }

    String getFormattedConfidence() {
        String.format("%.1f%%", confidencePercentage)
    }

    boolean confidentToSayBetter() {
        return differencePercentage <= 0 && confidencePercentage > ENOUGH_REGRESSION_CONFIDENCE_THRESHOLD
    }

    boolean confidentToSayWorse() {
        return differencePercentage > 0 && confidencePercentage > ENOUGH_REGRESSION_CONFIDENCE_THRESHOLD
    }

        double signum = Math.signum(firstExecution.differencePercentage)
        if (signum == 0.0d) {
            signum = -1.0
        }
        return firstExecution.confidencePercentage * signum
    }

    double getDifferencePercentage() {
        return currentExecutions.empty ? Double.NEGATIVE_INFINITY : currentExecutions[0].getDifferencePercentage()
    }