Невозможно изменить значение для свечи

using System;
using System.Net;
using System.Security;
using System.Windows;
using System.Windows.Media;
using Ecng.Common;
using StockSharp.Algo;
using StockSharp.Algo.Candles;
using StockSharp.BusinessEntities;
using StockSharp.Xaml.Charting;
using StockSharp.Quik;
using Ecng.Xaml;
using StockSharp.Messages;
using System.Linq;

namespace ShowChart
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private QuikTrader _trader;
        public static CandleManager CandleManager { get; private set; }
        public static CandleSeries Series { get; private set; }
        public CandleSeries CandleSeries { get; private set; }
        public ChartArea Area { get; set; }
        public bool IsRealtiem { get; set; }
        public ChartCandleElement ChartCandleElement { get; private set; }


        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            _trader = new QuikTrader()
            {
                LuaLogin = "Quik",
                LuaPassword = "Quik".To<SecureString>(),
                LuaFixServerAddress = "127.0.0.1:5001".To<EndPoint>(),
            };
            CandleManager = new CandleManager(_trader);

            _trader.NewSecurity += security =>
            {
                if (security.Id == "SBER@QJSIM")
                {
                    CandleSeries = new CandleSeries(typeof(TimeFrameCandle), security, TimeSpan.FromMinutes(1));
                    this.GuiAsync(InitCart);

                }
            };
            _trader.Connect();
        }

        public void InitCart()
        {
            Chart.ClearAreas();

            Area = new ChartArea();
            var yAxis = Area.YAxises.First();
            yAxis.AutoRange = true;
            Chart.IsAutoScroll = true;
            Chart.ShowOverview = true;
            Chart.AddArea(Area);

            ChartCandleElement = new ChartCandleElement()
            {
                DownFillColor = Brushes.DarkRed.Color,
                UpFillColor = Brushes.DarkGreen.Color,
                DownBorderColor = Brushes.Red.Color,
                UpBorderColor = Brushes.Green.Color,
            };
            Chart.AddElement(Area, ChartCandleElement, CandleSeries);
        }

        public void DisplayNewMarketData(CandleSeries candleSeries, Candle candle)
        {
            IsRealtiem = candle.CloseTime + TimeSpan.FromSeconds(5) > DateTimeOffset.Now || IsRealtiem;

            var chartDrawData = new ChartDrawData();
            var group = chartDrawData.Group(candle.OpenTime);
            group.Add(ChartCandleElement, candle);
            if (IsRealtiem || candle.State == CandleStates.Finished)
                Chart.Draw(chartDrawData);
        }


        private void StartButton_Click(object sender, RoutedEventArgs e)
        {
            
            CandleManager.Processing += DisplayNewMarketData;
            CandleManager.Start(CandleSeries);
        }

        private void StopButton_Click(object sender, RoutedEventArgs e)
        {
            CandleManager.Processing -= DisplayNewMarketData;
            CandleManager.Stop(CandleSeries);
            InitCart();
        }
    }
}