помогите со свечками

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Charting="clr-namespace:StockSharp.Xaml.Charting;assembly=StockSharp.Xaml" xmlns:Custom="http://schemas.stocksharp.com/xaml" x:Class="TestWpfA.MainWindow"
        Title="MainWindow" Height="600" Width="800">
    <Grid>
        <Button x:Name="Cnnect" Content="Connect" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="75" Click="Cnnect_Click" Height="33"/>
        <Button x:Name="Start" Content="Start" HorizontalAlignment="Left" Margin="697,10,0,0" VerticalAlignment="Top" Width="75" Click="Start_Click" Height="33"/>

        <Charting:Chart x:Name="Chart" ChartTheme="Chrome" IsAutoScroll="True" CrossHair="True" Margin="10,62,10,10"/>
        <ComboBox x:Name="PortfoliosComboBox" HorizontalAlignment="Left" Margin="95,21,0,0" VerticalAlignment="Top" Width="120"/>
        <Label x:Name="Portfolius" Content="Портфель:" HorizontalAlignment="Left" Margin="104,-2,0,0" VerticalAlignment="Top"/>
        <ComboBox x:Name="SecurityComboBox" HorizontalAlignment="Left" Margin="223,21,0,0" VerticalAlignment="Top" Width="120"/>
        <Label x:Name="Securities" Content="Инструмент:" HorizontalAlignment="Left" Margin="231,-2,0,0" VerticalAlignment="Top"/>
        <DatePicker x:Name="DatePickerFrom" HorizontalAlignment="Left" Margin="452,19,0,0" VerticalAlignment="Top" SelectedDateFormat="Short" Text="Дата с:" IsTodayHighlighted="True" IsEnabled="False"/>
        <DatePicker x:Name="DatePickerTo" HorizontalAlignment="Left" Margin="585,19,0,0" VerticalAlignment="Top" Text="Дата по:" IsEnabled="False"/>
        <Label x:Name="LabelTo" Content="по" HorizontalAlignment="Left" Margin="558,17,0,0" VerticalAlignment="Top" RenderTransformOrigin="1.485,0.565" IsEnabled="False"/>
        <CheckBox x:Name="CheckBoxPeriod" Content="Выбрать&#xD;&#xA;период" HorizontalAlignment="Left" Margin="362,17,0,0" VerticalAlignment="Top" Click="CheckBoxPeriod_Click"/>
        <Label x:Name="LabelFrom" Content="с:" HorizontalAlignment="Left" Margin="430,17,0,0" VerticalAlignment="Top" IsEnabled="False"/>

    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using Ecng.Collections;
using Ecng.Common;
using Ecng.Configuration;
using Ecng.Xaml;

using StockSharp.Quik;
using StockSharp.Algo;
using StockSharp.Algo.Candles;
using StockSharp.Algo.Indicators;
using StockSharp.Algo.Strategies;
using StockSharp.Algo.Testing;
using StockSharp.BusinessEntities;
using StockSharp.Logging;
using StockSharp.Messages;
using StockSharp.Xaml.Charting;

namespace TestWpfA
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private QuikTrader _trader;
        private CandleSeries _candleSeries;
        private CandleManager _candleManager;
        private ChartCandleElement _chartCandleElement;
        private ChartArea _chartArea;
        private void Cnnect_Click(object sender, RoutedEventArgs e)
        {
            _trader = new QuikTrader(QuikTerminal.GetDefaultPath());

            _trader.NewSecurities += securities => this.GuiAsync(() =>
            {
                SecurityComboBox.ItemsSource = _trader.Securities;
            });

            _trader.NewPortfolios += portfolios => this.GuiAsync(() =>
            {
                PortfoliosComboBox.ItemsSource = _trader.Portfolios;
            });

            _trader.Connected += () => _trader.StartExport();
            _trader.Connect();
        }

        private void Start_Click(object sender, RoutedEventArgs e)
        {
            _candleManager = new CandleManager(_trader);

            _candleSeries = new CandleSeries(typeof(TimeFrameCandle), (Security)SecurityComboBox.SelectedItem, TimeSpan.FromMinutes(1));
            
            _chartCandleElement = new ChartCandleElement();

            _chartArea = new ChartArea();
            _chartArea.Elements.Add(_chartCandleElement);

            Chart.Areas.Add(_chartArea);

            _candleManager.Processing += DrawCandle;
            
            if (CheckBoxPeriod.IsChecked == true)
            {
                _candleManager.Start(_candleSeries, DatePickerFrom.SelectedDate.Value, DatePickerTo.SelectedDate.Value);
            }
            else
            {
                _candleManager.Start(_candleSeries);
            }
            
        }

        private void DrawCandle(CandleSeries series, Candle candle)
        {
           if (candle.State == CandleStates.Finished) this.GuiAsync(() => Chart.ProcessCandle(_chartCandleElement, candle));
        }

        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            if (_trader != null)
            {
                _trader.StopExport();
                _trader.Disconnect();
            }

            base.OnClosing(e);
        }

        private void CheckBoxPeriod_Click(object sender, RoutedEventArgs e)
        {
            if (CheckBoxPeriod.IsChecked == true)
            {
                this.LabelFrom.IsEnabled = true;
                this.DatePickerFrom.IsEnabled = true;
                this.LabelTo.IsEnabled = true;
                this.DatePickerTo.IsEnabled = true;
            }
            else
            {
                this.LabelFrom.IsEnabled = false;
                this.DatePickerFrom.IsEnabled = false;
                this.LabelTo.IsEnabled = false;
                this.DatePickerTo.IsEnabled = false;
            }
        }        
    }