AlphaTrend indicator


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

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class mAlphaTrend : Indicator
    {
        [Parameter("Periods (14)", DefaultValue = 14)]
        public int inpPeriods { get; set; }
        [Parameter("Multiplier", DefaultValue = 1.618)]
        public double inpMultiplier { get; set; }
        [Parameter("ATR Smooth Type", DefaultValue = MovingAverageType.Exponential)]
        public MovingAverageType inpATRSmoothType { get; set; }
        [Parameter("Volume Data (no)", DefaultValue = false)]
        public bool inpVolumeData { get; set; }

        [Output("AlphaTrend", LineColor = "Black", PlotType = PlotType.DiscontinuousLine, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outAlphaTrend { get; set; }
        [Output("AlphaTrend Signal", LineColor = "Transparent", PlotType = PlotType.DiscontinuousLine, LineStyle = LineStyle.Solid, Thickness = 1)]
        public IndicatorDataSeries outAlphaTrendSignal { get; set; }
        [Output("AlphaTrend - Bullish", LineColor = "Green", PlotType = PlotType.DiscontinuousLine, LineStyle = LineStyle.Solid, Thickness = 2)]
        public IndicatorDataSeries outAlphaTrendBullish { get; set; }
        [Output("AlphaTrend - Bearish", LineColor = "Red", PlotType = PlotType.DiscontinuousLine, LineStyle = LineStyle.Solid, Thickness = 2)]
        public IndicatorDataSeries outAlphaTrendBearish { get; set; }

        private AverageTrueRange _atr;
        private RelativeStrengthIndex _rsi;
        private MoneyFlowIndex _mfi;
        private IndicatorDataSeries _trendup, _trenddn, _alphatrend, _trend;


        protected override void Initialize()
        {
            _atr = Indicators.AverageTrueRange(inpPeriods, inpATRSmoothType);
            _rsi = Indicators.RelativeStrengthIndex(Bars.ClosePrices, inpPeriods);
            _mfi = Indicators.MoneyFlowIndex(inpPeriods);
            _trendup = CreateDataSeries();
            _trenddn = CreateDataSeries();
            _alphatrend = CreateDataSeries();
            _trend = CreateDataSeries();
        }

        public override void Calculate(int i)
        {
            _trendup[i] = Bars.LowPrices[i] - _atr.Result[i] * inpMultiplier;
            _trenddn[i] = Bars.HighPrices[i] + _atr.Result[i] * inpMultiplier;
            _alphatrend[i] = (inpVolumeData == true ? _rsi.Result[i] >= 50.0 : _mfi.Result[i] >= 50) ? _trendup[i] < _alphatrend[i - 1] ? _alphatrend[i - 1] : _trendup[i] : _trenddn[i] > _alphatrend[i - 1] ? _alphatrend[i - 1] : _trenddn[i];

            _trend[i] = _alphatrend[i] > _alphatrend[i - 1] ? +1 : _alphatrend[i] < _alphatrend[i - 1] ? -1 : _alphatrend[i - 1];

            outAlphaTrend[i] = _alphatrend[i];

            outAlphaTrendBullish[i] = outAlphaTrendBullish[i - 1];
            outAlphaTrendBearish[i] = outAlphaTrendBearish[i - 1];
            if (_trend[i] == +1)
            {
                outAlphaTrendBullish[i] = _alphatrend[i];
                outAlphaTrendBearish[i] = double.NaN;
                outAlphaTrendSignal[i] = outAlphaTrend[i] - Symbol.TickSize;
            }

            if (_trend[i] == -1)
            {
                outAlphaTrendBullish[i] = double.NaN;
                outAlphaTrendBearish[i] = _alphatrend[i];
                outAlphaTrendSignal[i] = outAlphaTrend[i] + Symbol.TickSize;
            }
        }
    }
}