SMMA - Smoothed Moving Average

To whom it may concern

using System;
using cAlgo.API;
using cAlgo.API.Collections;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class mSMMA : Indicator
    {
        [Parameter("Period (10)", DefaultValue = 10, MinValue = 2)]
        public int inpPeriod { get; set; }
        [Parameter("Data Source (close)", DefaultValue = enumPriceTypes.Close)]
        public enumPriceTypes inpPriceType { get; set; }

        [Output("SMMA", LineColor = "Black", PlotType = PlotType.Line, Thickness = 1)]
        public IndicatorDataSeries outSMMA { get; set; }

        private IndicatorDataSeries _price, _smma;
        private MovingAverage _pricesmooth;


        protected override void Initialize()
        {
            _price = CreateDataSeries();
            _smma = CreateDataSeries();
            _pricesmooth = Indicators.MovingAverage(_price, inpPeriod, MovingAverageType.Simple);
        }

        public override void Calculate(int i)
        {
            switch (inpPriceType)
            {
                case enumPriceTypes.Open:
                    _price[i] = Bars.OpenPrices[i];
                    break;
                case enumPriceTypes.Close:
                    _price[i] = Bars.ClosePrices[i];
                    break;
                case enumPriceTypes.High:
                    _price[i] = Bars.HighPrices[i];
                    break;
                case enumPriceTypes.Low:
                    _price[i] = Bars.LowPrices[i];
                    break;
                case enumPriceTypes.Median:
                    _price[i] = Bars.MedianPrices[i];
                    break;
                case enumPriceTypes.Typical:
                    _price[i] = Bars.TypicalPrices[i];
                    break;
                case enumPriceTypes.Weighted:
                    _price[i] = Bars.WeightedPrices[i];
                    break;
                default:
                    _price[i] = Bars.ClosePrices[i];
                    break;
            }
            _smma[i] = (((i>1 ? _smma[i-1] : _price[i]) * (inpPeriod - 1)) + _price[i]) / inpPeriod;
            
            outSMMA[i] = _smma[i];
        }
    }

    public enum enumPriceTypes
    {
        Open,
        Close,
        High,
        Low,
        Median,
        Typical,
        Weighted
    }
}