[HandlerName("SVE RSI IFT")]
    [HandlerCategory("vvTSLtools")]
    public class SVE_RSI_IFT : IDouble2DoubleHandler, IContextUses
    {
        /* Smoothed RSI Inverse Fisher Transform by Sylvain Vervoort
         *
         * http://codebase.mql4.com/7651
         * http://blog.traderslibrary.com/sylvain_vervoort/2010/09/smoothed-rsi-inverse-fisher-transform-excerpt-from-sc-magazine.html
         * 
         * converted by vito333, 2012
         * 
         */
        [HandlerParameter(true, "4", Min = "3", Max = "25", Step = "1")]
        public int RSI_Period { get; set; }
        [HandlerParameter(true, "4", Min = "3", Max = "50", Step = "1")]
        public int MA_Period { get; set; }



        public static IList<double> GenSRSI(IList<double> src, int _RSI_Period, int _MA_Period)
        {
            int maxperiod = Math.Max(_RSI_Period, _MA_Period);
            var SRSI = new double[src.Count];
            var rainbow = new double[src.Count];
            //---- prepare partial averages
            var wma0 = LWMA.GenWMA(src, 2);
            var wma1 = LWMA.GenWMA(wma0, 2);
            var wma2 = LWMA.GenWMA(wma1, 2);
            var wma3 = LWMA.GenWMA(wma2, 2);
            var wma4 = LWMA.GenWMA(wma3, 2);
            var wma5 = LWMA.GenWMA(wma4, 2);
            var wma6 = LWMA.GenWMA(wma5, 2);
            var wma7 = LWMA.GenWMA(wma6, 2);
            var wma8 = LWMA.GenWMA(wma7, 2);
            var wma9 = LWMA.GenWMA(wma8, 2);

            //----
            double rb_val = 0;
            for (int i = 0; i < src.Count; i++)
            {
                rb_val = 5 * wma0[i] + 4 * wma1[i] + 3 * wma2[i] + 2 * wma3[i] + wma4[i] + wma5[i] + wma6[i] + wma7[i] + wma8[i] + wma9[i];
                rb_val /= 20;
                rainbow[i] = rb_val;
            }
            //---- calculate rsi from rainbow smoothed price curve 
            var rsi = Series.RSI(rainbow, _RSI_Period);
            double[] rsi2 = new double[src.Count];
            for (int i = 0; i < src.Count; i++)
                rsi2[i] = 0.1 * (rsi[i] - 50);

            //---- smooth the rsi with Vervoort zero lag MA
            var ema0 = EMA.EMA_TSLab(rsi2, _MA_Period);
            var ema1 = EMA.EMA_TSLab(ema0, _MA_Period);
            var srsi = new double[src.Count];
            for (int i = 0; i < src.Count; i++)
                srsi[i] = ema0[i] + (ema0[i] - ema1[i]);

            //---- основной цикл расчета индикатора
            for (int i = 2; i < src.Count; i++)
            {
                SRSI[i] = ((Math.Exp(2 * srsi[i]) - 1) / (Math.Exp(2 * srsi[i]) + 1) + 1) * 50;
            }
            //
            return SRSI;
        }

        public IList<double> Execute(IList<double> src)
        {
            return GenSRSI(src, RSI_Period, MA_Period);
        }

        public IContext Context { get; set; }
    }