Slow Adaptive Trend Line indicator

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

namespace cAlgo
{
    [Indicator(IsOverlay = true, AccessRights = AccessRights.None)]
    public class mSATL : Indicator
    {
        [Parameter("Data Source (close)", DefaultValue = enumPriceTypes.Close)]
        public enumPriceTypes inpPriceType { get; set; }

        [Output("SATL", LineColor = "Black", PlotType = PlotType.Line, Thickness = 2)]
        public IndicatorDataSeries outSATL { get; set; }
        
        private IndicatorDataSeries _price, _satl;
       

        protected override void Initialize()
        {
            _price = CreateDataSeries();
            _satl = CreateDataSeries();
        }

        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;
            }
            
            _satl[i] = i>64 ?
               +0.0982862174 * _price[i]
               +0.0975682269 * _price[i-1]
               +0.0961401078 * _price[i-2]
               +0.0940230544 * _price[i-3]
               +0.0912437090 * _price[i-4]
               +0.0878391006 * _price[i-5]
               +0.0838544303 * _price[i-6]
               +0.0793406350 * _price[i-7]
               +0.0743569346 * _price[i-8]
               +0.0689666682 * _price[i-9]
               +0.0632381578 * _price[i-10]
               +0.0572428925 * _price[i-11]
               +0.0510534242 * _price[i-12]
               +0.0447468229 * _price[i-13]
               +0.0383959950 * _price[i-14]
               +0.0320735368 * _price[i-15]
               +0.0258537721 * _price[i-16]
               +0.0198005183 * _price[i-17]
               +0.0139807863 * _price[i-18]
               +0.0084512448 * _price[i-19]
               +0.0032639979 * _price[i-20]
               -0.0015350359 * _price[i-21]
               -0.0059060082 * _price[i-22]
               -0.0098190256 * _price[i-23]
               -0.0132507215 * _price[i-24]
               -0.0161875265 * _price[i-25]
               -0.0186164872 * _price[i-26]
               -0.0205446727 * _price[i-27]
               -0.0219739146 * _price[i-28]
               -0.0229204861 * _price[i-29]
               -0.0234080863 * _price[i-30]
               -0.0234566315 * _price[i-31]
               -0.0231017777 * _price[i-32]
               -0.0223796900 * _price[i-33]
               -0.0213300463 * _price[i-34]
               -0.0199924534 * _price[i-35]
               -0.0184126992 * _price[i-36]
               -0.0166377699 * _price[i-37]
               -0.0147139428 * _price[i-38]
               -0.0126796776 * _price[i-39]
               -0.0105938331 * _price[i-40]
               -0.0084736770 * _price[i-41]
               -0.0063841850 * _price[i-42]
               -0.0043466731 * _price[i-43]
               -0.0023956944 * _price[i-44]
               -0.0005535180 * _price[i-45]
               +0.0011421469 * _price[i-46]
               +0.0026845693 * _price[i-47]
               +0.0040471369 * _price[i-48]
               +0.0052380201 * _price[i-49]
               +0.0062194591 * _price[i-50]
               +0.0070340085 * _price[i-51]
               +0.0076266453 * _price[i-52]
               +0.0080376628 * _price[i-53]
               +0.0083037666 * _price[i-54]
               +0.0083694798 * _price[i-55]
               +0.0082901022 * _price[i-56]
               +0.0080741359 * _price[i-57]
               +0.0077543820 * _price[i-58]
               +0.0073260526 * _price[i-59]
               +0.0068163569 * _price[i-60]
               +0.0062325477 * _price[i-61]
               +0.0056078229 * _price[i-62]
               +0.0049516078 * _price[i-63]
               +0.0161380976 * _price[i-64]
               : _price[i];
               
            outSATL[i] = _satl[i];
        }
    }
     
    public enum enumPriceTypes
    {
        Open,
        Close,
        High,
        Low,
        Median,
        Typical,
        Weighted
    }
}