NinjaTrader scalping strategy with managed NinjaScript code

using System;
using System.ComponentModel.DataAnnotations;
using NinjaTrader.Cbi;
using NinjaTrader.NinjaScript;
using NinjaTrader.NinjaScript.Indicators;

namespace NinjaTrader.NinjaScript.Strategies
{
    public class ScalpingStrategy : Strategy
    {
        [NinjaScriptProperty]
        [Range(1, 100)]
        [Display(Name = "Fast EMA Period", GroupName = "Parameters", Order = 0)]
        public int FastEmaPeriod { get; set; }

        [NinjaScriptProperty]
        [Range(2, 200)]
        [Display(Name = "Slow EMA Period", GroupName = "Parameters", Order = 1)]
        public int SlowEmaPeriod { get; set; }

        [NinjaScriptProperty]
        [Range(1, 100)]
        [Display(Name = "Profit Target (Ticks)", GroupName = "Risk", Order = 2)]
        public int TargetTicks { get; set; }

        [NinjaScriptProperty]
        [Range(1, 100)]
        [Display(Name = "Stop Loss (Ticks)", GroupName = "Risk", Order = 3)]
        public int StopLossTicks { get; set; }

        private EMA fastEma;
        private EMA slowEma;

        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Name = "ScalpingStrategy";
                Description = "Fast momentum scalping strategy with managed tick-based brackets.";
                Calculate = Calculate.OnBarClose;
                EntriesPerDirection = 1;
                EntryHandling = EntryHandling.AllEntries;
                IsExitOnSessionCloseStrategy = true;
                ExitOnSessionCloseSeconds = 30;
                IsFillLimitOnTouch = false;
                TraceOrders = false;

                FastEmaPeriod = 9;
                SlowEmaPeriod = 21;
                TargetTicks = 8;
                StopLossTicks = 12;
            }
            else if (State == State.DataLoaded)
            {
                fastEma = EMA(FastEmaPeriod);
                slowEma = EMA(SlowEmaPeriod);

                SetProfitTarget("LongScalp", CalculationMode.Ticks, TargetTicks);
                SetStopLoss("LongScalp", CalculationMode.Ticks, StopLossTicks, false);

                SetProfitTarget("ShortScalp", CalculationMode.Ticks, TargetTicks);
                SetStopLoss("ShortScalp", CalculationMode.Ticks, StopLossTicks, false);
            }
        }

        protected override void OnBarUpdate()
        {
            if (CurrentBar < Math.Max(FastEmaPeriod, SlowEmaPeriod))
                return;

            if (Position.MarketPosition == MarketPosition.Flat)
            {
                if (CrossAbove(fastEma, slowEma, 1))
                {
                    EnterLong("LongScalp");
                }
                else if (CrossBelow(fastEma, slowEma, 1))
                {
                    EnterShort("ShortScalp");
                }
            }
        }
    }
}