Forex_Strategy_Builder.Percent_BB.Calculate C# (CSharp) Method

        public override void Calculate(SlotTypes slotType)
        {
            // Reading the parameters
            MAMethod  maMethod  = (MAMethod )IndParam.ListParam[1].Index;
            BasePrice basePrice = (BasePrice)IndParam.ListParam[2].Index;
            int       iPeriod   = (int)IndParam.NumParam  [0].Value;
            double    dMpl      = IndParam.NumParam[1].Value;
            int       iLevel    = (int)IndParam.NumParam[2].Value;
            int       iPrvs     = IndParam.CheckParam[0].Checked ? 1 : 0;

            // Calculation
            double[] adPrice  = Price(basePrice);
            double[] adMA     = MovingAverage(iPeriod, 0, maMethod, adPrice);
            double[] adPrcBB  = new double[Bars];

            int iFirstBar = iPeriod + iPrvs + 2;

            double dSum;
            double dStdDev;
            double dDelta;
            for (int iBar = iPeriod; iBar < Bars; iBar++)
            {
                dSum = 0;
                for (int i = 0; i < iPeriod; i++)
                {
                    dDelta = (adPrice[iBar - i] - adMA[iBar]);
                    dSum  += dDelta * dDelta;
                }
                dStdDev = Math.Sqrt(dSum / iPeriod);
                double adUpBand = adMA[iBar] + dMpl * dStdDev;
                double adDnBand = adMA[iBar] - dMpl * dStdDev;
                adPrcBB[iBar] = (adPrice[iBar] - adDnBand) / (adUpBand - adDnBand) * 100;
            }

            // Saving the components
            Component = new IndicatorComp[3];

            Component[0] = new IndicatorComp();
            Component[0].CompName   = "%BB";
            Component[0].DataType   = IndComponentType.IndicatorValue;
            Component[0].ChartType  = IndChartType.Line;
            Component[0].ChartColor = Color.RoyalBlue;
            Component[0].FirstBar   = iFirstBar;
            Component[0].Value      = adPrcBB;

            Component[1] = new IndicatorComp();
            Component[1].ChartType  = IndChartType.NoChart;
            Component[1].FirstBar   = iFirstBar;
            Component[1].Value      = new double[Bars];

            Component[2] = new IndicatorComp();
            Component[2].ChartType  = IndChartType.NoChart;
            Component[2].FirstBar   = iFirstBar;
            Component[2].Value      = new double[Bars];

            // Sets the Component's type
            if (slotType == SlotTypes.OpenFilter)
            {
                Component[1].DataType = IndComponentType.AllowOpenLong;
                Component[1].CompName = "Is long entry allowed";
                Component[2].DataType = IndComponentType.AllowOpenShort;
                Component[2].CompName = "Is short entry allowed";
            }
            else if (slotType == SlotTypes.CloseFilter)
            {
                Component[1].DataType = IndComponentType.ForceCloseLong;
                Component[1].CompName = "Close out long position";
                Component[2].DataType = IndComponentType.ForceCloseShort;
                Component[2].CompName = "Close out short position";
            }

            // Calculation of the logic
            IndicatorLogic indLogic = IndicatorLogic.It_does_not_act_as_a_filter;

            switch (IndParam.ListParam[0].Text)
            {
                case "The %BB rises":
                    indLogic = IndicatorLogic.The_indicator_rises;
                    SpecialValues = new double[] { 0, 50, 100 };
                    break;

                case "The %BB falls":
                    indLogic = IndicatorLogic.The_indicator_falls;
                    SpecialValues = new double[] { 0, 50, 100 };
                    break;

                case "The %BB is higher than the Level line":
                    indLogic = IndicatorLogic.The_indicator_is_higher_than_the_level_line;
                    SpecialValues = new double[] { iLevel, 100 - iLevel };
                    break;

                case "The %BB is lower than the Level line":
                    indLogic = IndicatorLogic.The_indicator_is_lower_than_the_level_line;
                    SpecialValues = new double[] { iLevel, 100 - iLevel };
                    break;

                case "The %BB crosses the Level line upward":
                    indLogic = IndicatorLogic.The_indicator_crosses_the_level_line_upward;
                    SpecialValues = new double[] { iLevel, 100 - iLevel };
                    break;

                case "The %BB crosses the Level line downward":
                    indLogic = IndicatorLogic.The_indicator_crosses_the_level_line_downward;
                    SpecialValues = new double[] { iLevel, 100 - iLevel };
                    break;

                case "The %BB changes its direction upward":
                    indLogic = IndicatorLogic.The_indicator_changes_its_direction_upward;
                    SpecialValues = new double[] { 0, 50, 100 };
                    break;

                case "The %BB changes its direction downward":
                    indLogic = IndicatorLogic.The_indicator_changes_its_direction_downward;
                    SpecialValues = new double[] { 0, 50, 100 };
                    break;

                default:
                    break;
            }

            OscillatorLogic(iFirstBar, iPrvs, adPrcBB, iLevel, 100 - iLevel, ref Component[1], ref Component[2], indLogic);

            return;
        }