[HandlerName("T3")]
[HandlerCategory("vvAverages")]
public class T3 : IDouble2DoubleHandler, IContextUses
    {
        [HandlerParameter(true, "14", Min = "5", Max = "80", Step = "1")]
        public int Period { get; set; }
        [HandlerParameter(true, "0.618", Min = "0", Max = "1", Step = "0.05")]
        public double factor { get; set; }

        public static IList<double> GenT3(IList<double> src, IContext ctx, int _Period, double _factor)
        {
            var barscount = src.Count;
            var MapBuffer = new double[barscount];

            //---- variable reset
            double e1 = 0, e2 = 0, e3 = 0, e4 = 0, e5 = 0, e6 = 0;
            double c1 = 0, c2 = 0, c3 = 0, c4 = 0;
            double n = 0, w1 = 0, w2 = 0, b2 = 0, b3 = 0;

            b2 = _factor * _factor;
            b3 = b2 * _factor;
            c1 = -b3;
            c2 = (3 * (b2 + b3));
            c3 = -3 * (2 * b2 + _factor + b3);
            c4 = (1 + 3 * _factor + b3 + 3 * b2);
            n = _Period;

            if (n < 1) n = 1;
            n = 1 + 0.5 * (n - 1);
            w1 = 2 / (n + 1);
            w2 = 1 - w1;

            for (int i = 0; i < barscount; i++)
            {
                e1 = w1 * src[i] + w2 * e1;
                e2 = w1 * e1 + w2 * e2;
                e3 = w1 * e2 + w2 * e3;
                e4 = w1 * e3 + w2 * e4;
                e5 = w1 * e4 + w2 * e5;
                e6 = w1 * e5 + w2 * e6;

                MapBuffer[i] = c1 * e6 + c2 * e5 + c3 * e4 + c4 * e3;
            }   

           return MapBuffer;
        }

        public IList<double> Execute(IList<double> src)
        {
            return GenT3(src, Context, Period, factor);
        }


        public IContext Context { get; set; }
    }