Elder Impulse

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 ElderImpulse : Indicator
    {
        [Parameter(DefaultValue = 13)]
        public int EMA_Periods { get; set; }
        [Parameter(DefaultValue = 26)]
        public int MACD_Slow { get; set; }
        [Parameter(DefaultValue = 12)]
        public int MACD_Fast { get; set; }

        public int dir = 0;

        private ExponentialMovingAverage ema;
        private MacdCrossOver MACD;

        protected override void Initialize()
        {
            ema = Indicators.ExponentialMovingAverage(MarketSeries.Close, EMA_Periods);
            MACD = Indicators.MacdCrossOver(MACD_Slow, MACD_Fast, 9);
        }

        public override void Calculate(int i)
        {
            dir = 0;

            if (ema.Result[i] > ema.Result[i - 1])
                if (MACD.MACD[i] > MACD.MACD[i - 1])
                    dir = 1;

            if (ema.Result[i] < ema.Result[i - 1])
                if (MACD.MACD[i] < MACD.MACD[i - 1])
                    dir = -1;

            DrawCandles(i);
        }

        private void DrawCandles(int i)
        {
            Colors color = dir == 1 ? Colors.Green : Colors.Blue;
            color = dir == -1 ? Colors.Red : color;
            ChartObjects.DrawLine("high low" + i, i, MarketSeries.High[i], i, MarketSeries.Low[i], color);
            ChartObjects.DrawLine("open close" + i, i, MarketSeries.Close[i], i, MarketSeries.Open[i], color, 3, LineStyle.Solid);
            return;
        }
    }
}