Trend Following Bot

// -------------------------------------------------------------------------------------------------
//
//    This code is a cAlgo API sample.
//
//    This cBot is intended to be used as a sample and does not guarantee any particular outcome or
//    profit of any kind. Use it at your own risk.
//
//    The "Sample Trend cBot" will buy when fast period moving average crosses the slow period moving average and sell when 
//    the fast period moving average crosses the slow period moving average. The orders are closed when an opposite signal 
//    is generated. There can only by one Buy or Sell order at any time.
//
// -------------------------------------------------------------------------------------------------

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

namespace cAlgo
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class TrendFollow10100Exponenetial : Robot
    {
        [Parameter("MA Type")]
        public MovingAverageType MAType { get; set; }

        [Parameter()]
        public DataSeries SourceSeries { get; set; }

        [Parameter("Slow Periods", DefaultValue = 100)]
        public int SlowPeriods { get; set; }

        [Parameter("Fast Periods", DefaultValue = 10)]
        public int FastPeriods { get; set; }

        [Parameter(DefaultValue = 10000, MinValue = 0)]
        public int Volume { get; set; }

        private MovingAverage slowMa;
        private MovingAverage fastMa;
        private const string label = "Exponential10and100";

        protected override void OnStart()
        {
            fastMa = Indicators.MovingAverage(SourceSeries, FastPeriods, MAType);
            slowMa = Indicators.MovingAverage(SourceSeries, SlowPeriods, MAType);
        }

        protected override void OnBar()
        {
            var longPosition = Positions.Find(label, Symbol, TradeType.Buy);
            var shortPosition = Positions.Find(label, Symbol, TradeType.Sell);

            var currentSlowMa = slowMa.Result.Last(0);
            var currentFastMa = fastMa.Result.Last(0);
            var previousSlowMa = slowMa.Result.Last(1);
            var previousFastMa = fastMa.Result.Last(1);
            //&&  previousSlowMa > previousFastMa

            if (currentSlowMa <= currentFastMa && longPosition == null)
            {
                if (shortPosition != null)
                    ClosePosition(shortPosition);
                ExecuteMarketOrder(TradeType.Buy, Symbol, Volume, label);
            }
            //&& previousSlowMa < previousFastMa
            else if (currentSlowMa >= currentFastMa && shortPosition == null)
            {
                if (longPosition != null)
                    ClosePosition(longPosition);
                ExecuteMarketOrder(TradeType.Sell, Symbol, Volume, label);
            }
        }
    }
}