just one trade at Day

Hi (Hi Pani)
how can i write a line of code that causes my bot to make only one trade a day?
 Below is my code lines

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.ESouthAmericaStandardTime, AccessRights = AccessRights.None)]
    public class bot : Robot
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }

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

        [Parameter("Periods", DefaultValue = 14)]
        public int Periods { get; set; }

        [Parameter("Volume", DefaultValue = 10000, MinValue = 1000)]
        public int Volume { get; set; }


        [Parameter("Stop Loss (pips)", DefaultValue = 50, MinValue = 10)]
        public double StopLoss { get; set; }

        [Parameter("Take_Profit", DefaultValue = 100, MinValue = 10)]
        public double TakeProfit { get; set; }


        [Parameter("Start Hour", DefaultValue = 10.0)]
        public double StartTime { get; set; }

        [Parameter("Stop Hour", DefaultValue = 12.0)]
        public double StopTime { get; set; }

        private DateTime _startTime;
        private DateTime _stopTime;



        private StochasticOscillator _1hstoch2;

        protected override void OnStart()
        {
            _startTime = Server.Time.Date.AddHours(StartTime);
            _stopTime = Server.Time.Date.AddHours(StopTime);


        }



        protected override void OnTick()
        {



            {


            }







            var day = Server.Time.DayOfWeek;

            var hour1 = MarketData.GetBars(TimeFrame.Hour);

            if (Trade.IsExecuting)
                return;

            var currentHours = Server.Time.TimeOfDay.TotalHours;
            bool tradeTime = StartTime < StopTime ? currentHours > StartTime && currentHours < StopTime : currentHours < StopTime || currentHours > StartTime;

            if (!tradeTime)
                return;











            _1hstoch2 = Indicators.StochasticOscillator(hour1, 12, 3, 12, MovingAverageType.Simple);



            if (_1hstoch2.PercentK.LastValue > 80)

                if (day == DayOfWeek.Monday || day == DayOfWeek.Tuesday || day == DayOfWeek.Wednesday || day == DayOfWeek.Thursday)
                    if (Positions.Count == 0)



                        ExecuteMarketOrder(TradeType.Buy, Symbol, Volume, "bot", StopLoss, TakeProfit);











        }
    }
}