Elder Impulse System

The Theory

The Elder Impulse System was designed by Alexander Elder and featured in his book, Come into my trading room. According to Elder, “the system identifies inflection points where a trend speeds up or slows down”. The Impulse System is based on two indicators, a 13-day exponential moving average and the MACD-Histogram The moving average identifies the trend, while the MACD-Histogram measures momentum. As a result, the Impulse System combines trend following and momentum to identify tradable impulses. https://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:elder_impulse_system

Great indicator by https://ctrader.com/users/profile/7773" https://ctrader.com/algos/indicators/show/1476

My cBot using MACD-Histogram and EMA

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

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class cBot : Robot
    {
        private ExponentialMovingAverage _EMA;
        private MacdHistogram _MACD;
        private Position _position;

        [Parameter(DefaultValue = 1000, MinValue = 0)]
        public int Volume { get; set; }
        [Parameter("Period", DefaultValue = 9)]
        public int Period { get; set; }
        [Parameter("Long Cycle", DefaultValue = 26)]
        public int LongCycle { get; set; }
        [Parameter("Short Cycle", DefaultValue = 12)]
        public int ShortCycle { get; set; }
        [Parameter("Source", DefaultValue = 12)]
        public int Source { get; set; }
        [Parameter("Data Source")]
        public DataSeries Price { get; set; }




        protected override void OnStart()
        {
            _MACD = Indicators.MacdHistogram(LongCycle, ShortCycle, Period);
            _EMA = Indicators.ExponentialMovingAverage(Price, Period);
        }

        
        public override void Calculate(int index);
        }

        protected override void OnBar()
        {
            if (Trade.IsExecuting)
                return;

            bool isLongPositionOpen = _position != null && _position.TradeType == TradeType.Buy;
            bool isShortPositionOpen = _position != null && _position.TradeType == TradeType.Sell;

            if (_MACD.Histogram.LastValue > _MACD.Histogram.LastValue - 1 && _EMA.Result > _EMA.Result - 1 && !isLongPositionOpen)
            {
                ClosePosition();
                Buy();
            }

            if (_MACD.Histogram.LastValue > _MACD.Histogram.LastValue - 1 && _EMA.Result < _EMA.Result - 1 && !isLongPositionOpen)
            {
                ClosePosition();
                Sell();
            }
        }
        private void ClosePosition()
        {
            if (_position != null)
            {
                ClosePosition(_position);
                _position = null;
            }
        }

        private void Buy()
        {
            Trade.CreateBuyMarketOrder(Symbol, Volume);
        }

        private void Sell()
        {
            Trade.CreateSellMarketOrder(Symbol, Volume);
        }

        protected override void OnPositionOpened(Position openedPosition)
        {
            _position = openedPosition;
        }

    }
}

Errors, except for the last at line 88, are all infront of void at lines 43,63,72,77 and 82

#tradesafe