diff --git a/MtApi/ExtensionMethods.cs b/MtApi/ExtensionMethods.cs
index fa33115c..f96146b6 100755
--- a/MtApi/ExtensionMethods.cs
+++ b/MtApi/ExtensionMethods.cs
@@ -1,7 +1,39 @@
-namespace MtApi
+using System;
+using System.Threading.Tasks;
+
+namespace MtApi
 {
     static class ExtensionMethods
     {
+        #region Event Methods
+
+        public static Task FireEventAsync(this MtApiQuoteHandler evenHandler, object sender, string symbol, double bid, double ask)
+        {
+            return Task.Factory.StartNew(() =>
+            {
+                evenHandler?.Invoke(sender, symbol, bid, ask);
+            });
+        }
+
+        public static Task FireEventAsync(this EventHandler eventHandler, object sender)
+        {
+            return Task.Factory.StartNew(() =>
+            {
+                eventHandler?.Invoke(sender, EventArgs.Empty);
+            });
+        }
+
+        public static Task FireEventAsync<T>(this EventHandler<T> eventHandler, object sender, T e)
+            where T : EventArgs
+        {
+            return Task.Factory.StartNew(() =>
+            {
+                eventHandler?.Invoke(sender, e);
+            });
+        }
+
+        #endregion
+
         public static MtQuote Convert(this MTApiService.MtQuote quote)
         {
             return (quote != null) ? new MtQuote(quote.Instrument, quote.Bid, quote.Ask) : null;
diff --git a/MtApi/Monitors/AvailabilityOrdersEventArgs.cs b/MtApi/Monitors/AvailabilityOrdersEventArgs.cs
new file mode 100644
index 00000000..f6bea3c8
--- /dev/null
+++ b/MtApi/Monitors/AvailabilityOrdersEventArgs.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace MtApi.Monitors
+{
+    public class AvailabilityOrdersEventArgs : EventArgs
+    {
+        public AvailabilityOrdersEventArgs(List<MtOrder> opened, List<MtOrder> closed)
+        {
+            Opened = opened;
+            Closed = closed;
+        }
+
+        public List<MtOrder> Opened { get; private set; }
+        public List<MtOrder> Closed { get; private set; }
+    }
+}
diff --git a/MtApi/Monitors/TimeframeTradeMonitor.cs b/MtApi/Monitors/TimeframeTradeMonitor.cs
new file mode 100644
index 00000000..6a172f9a
--- /dev/null
+++ b/MtApi/Monitors/TimeframeTradeMonitor.cs
@@ -0,0 +1,61 @@
+
+namespace MtApi.Monitors
+{
+    public class TimeframeTradeMonitor : TradeMonitor
+    {
+        #region Fields
+        private volatile bool _isStarted = false;
+        #endregion
+
+        #region ctor
+        public TimeframeTradeMonitor(MtApiClient apiClient) 
+            : base(apiClient)
+        {
+            apiClient.OnLastTimeBar += ApiClient_OnLastTimeBar;
+        }
+        #endregion
+
+        #region Public Methods
+        //
+        // Summary:
+        //     Gets a value indicating whether the TimeframeTradeMonitor should raise checking orders
+        //
+        // Returns:
+        //     true if PositionMonitor should check orders
+        //     otherwise, false.
+        public override bool IsStarted
+        {
+            get
+            {
+                return _isStarted;
+            }
+        }
+        #endregion
+
+        #region Protected Methods
+        protected override void OnMtConnected() {}
+
+        protected override void OnMtDisconnected() {}
+
+        protected override void OnStart()
+        {
+            _isStarted = true;
+        }
+
+        protected override void OnStop()
+        {
+            _isStarted = false;
+        }
+        #endregion
+
+        #region Private Methods
+        private void ApiClient_OnLastTimeBar(object sender, TimeBarArgs e)
+        {
+            if (_isStarted)
+            {
+                Check();
+            }
+        }
+        #endregion
+    }
+}
diff --git a/MtApi/Monitors/TimerTradeMonitor.cs b/MtApi/Monitors/TimerTradeMonitor.cs
new file mode 100644
index 00000000..c8b430f2
--- /dev/null
+++ b/MtApi/Monitors/TimerTradeMonitor.cs
@@ -0,0 +1,90 @@
+using System.Timers;
+
+namespace MtApi.Monitors
+{
+    public class TimerTradeMonitor : TradeMonitor
+    {
+        #region Fields
+        private readonly Timer _timer = new Timer();
+        #endregion
+
+        #region ctor
+        public TimerTradeMonitor(MtApiClient apiClient) 
+            : base(apiClient)
+        {
+            _timer.Interval = 10000; //default interval 10 sec
+            _timer.Elapsed += _timer_Elapsed;
+
+        }
+        #endregion
+
+        #region Public Methods
+        //
+        // Summary:
+        //     Gets or sets the interval, expressed in milliseconds, at which to check orders
+        //
+        // Returns:
+        //     The time, in milliseconds, between checking events. The value
+        //     must be greater than zero, and less than or equal to System.Int32.MaxValue. 
+        //     The default is 10000 milliseconds.
+        //
+        // Exceptions:
+        //   T:System.ArgumentException:
+        //     The interval is less than or equal to zero.-or-The interval is greater than System.Int32.MaxValue,
+        //     and the PositionMonitor is currently started.
+        public double Interval
+        {
+            get { return _timer.Interval; }
+            set { _timer.Interval = value; }
+        }
+
+        //
+        // Summary:
+        //     Gets a value indicating whether the PositionMonitor should raise checking orders
+        //
+        // Returns:
+        //     true if TimerTradeMonitor should check orders
+        //     otherwise, false.
+        public override bool IsStarted
+        {
+            get { return _timer.Enabled; }
+        }
+        #endregion
+
+        #region Protected Methods
+        protected override void OnStart()
+        {
+            if (IsMtConnected)
+            {
+                _timer.Start();
+            }
+        }
+
+        protected override void OnStop()
+        {
+            _timer.Stop();
+        }
+
+        protected override void OnMtConnected()
+        {
+            _timer.Start();
+        }
+
+        protected override void OnMtDisconnected()
+        {
+            _timer.Stop();
+        }
+        #endregion
+
+        #region Private Methods
+        private void _timer_Elapsed(object sender, ElapsedEventArgs e)
+        {
+            _timer.Elapsed -= _timer_Elapsed; //unregister from events to prevent rise condition during work with orders
+
+            Check();
+
+            _timer.Elapsed += _timer_Elapsed; //register again
+        }
+        #endregion
+    }
+}
diff --git a/MtApi/Monitors/TradeMonitor.cs b/MtApi/Monitors/TradeMonitor.cs
new file mode 100644
index 00000000..d6fe0007
--- /dev/null
+++ b/MtApi/Monitors/TradeMonitor.cs
@@ -0,0 +1,190 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace MtApi.Monitors
+{
+    public abstract class TradeMonitor
+    {
+        #region Fields
+        private readonly MtApiClient _apiClient;
+        private List<MtOrder> _prevOrders;
+        private readonly object _locker = new object();
+        #endregion
+
+        #region ctor
+        public TradeMonitor(MtApiClient apiClient)
+        {
+            if (apiClient == null)
+                throw new ArgumentNullException(nameof(apiClient));
+
+            _apiClient = apiClient;
+        }
+        #endregion
+
+        #region Public Methods
+        //
+        // Summary:
+        //     Gets a value indicating whether the TradeMonitor should raise checking orders
+        //
+        // Returns:
+        //     true if TradeMonitor should check orders
+        //     otherwise, false.
+        public abstract bool IsStarted { get; }
+
+        //
+        // Summary:
+        //     Start checking orders.
+        //
+        public void Start()
+        {
+            _apiClient.ConnectionStateChanged += _apiClient_ConnectionStateChanged;
+            if (IsMtConnected)
+            {
+                InitialCheck();
+            }
+
+            OnStart();
+        }
+
+        //
+        // Summary:
+        //     Stop checking orders.
+        //
+        public void Stop()
+        {
+            _apiClient.ConnectionStateChanged -= _apiClient_ConnectionStateChanged;
+            OnStop();
+        }
+        #endregion
+
+        #region Events
+        //
+        // Summary:
+        //     Occurs when orders are opened or closed.
+        public event EventHandler<AvailabilityOrdersEventArgs> AvailabilityOrdersChanged;
+        #endregion
+
+        #region Protected Methods
+
+        protected abstract void OnStart();
+        protected abstract void OnStop();
+
+        protected abstract void OnMtConnected();
+        protected abstract void OnMtDisconnected();
+
+        public bool IsMtConnected
+        {
+            get
+            {
+                return _apiClient.ConnectionState == MtConnectionState.Connected;
+            }
+        }
+
+        protected void Check()
+        {
+            try
+            {
+                CheckOrders();
+            }
+            catch (MtConnectionException)
+            {
+                //TODO: write error to log
+            }
+            catch (MtExecutionException)
+            {
+                //TODO: write error to log
+            }
+        }
+        #endregion
+
+        #region Private Methods
+        private void CheckOrders()
+        {
+            var openedOrders = new List<MtOrder>();
+            var closedOrders = new List<MtOrder>();
+
+            // get current orders from MetaTrader
+            var tradesOrders = _apiClient.GetOrders(OrderSelectSource.MODE_TRADES);
+
+            List<MtOrder> prevOrders;
+            lock(_locker)
+            {
+                prevOrders = _prevOrders;
+            }
+
+            if (_prevOrders != null) //skip checking on first load orders
+            {
+                //check open orders
+                foreach (var order in tradesOrders)
+                {
+                    if (_prevOrders.Find(a => a.Ticket == order.Ticket) == null)
+                    {
+                        openedOrders.Add(order);
+                    }
+                }
+
+                //check closed orders
+                var closeOrdersTemp = new List<MtOrder>();
+                foreach (var order in _prevOrders)
+                {
+                    if (tradesOrders.Find(a => a.Ticket == order.Ticket) == null)
+                    {
+                        closeOrdersTemp.Add(order);
+                    }
+                }
+
+                if (closeOrdersTemp.Count > 0)
+                {
+                    //get closed orders from history with actual values
+                    var historyOrders = _apiClient.GetOrders(OrderSelectSource.MODE_HISTORY);
+                    foreach (var order in closeOrdersTemp)
+                    {
+                        var closedOrder = historyOrders.Find(a => a.Ticket == order.Ticket);
+                        if (closedOrder != null)
+                        {
+                            closedOrders.Add(closedOrder);
+                        }
+                    }
+                }
+            }
+
+            lock(_locker)
+            {
+                _prevOrders = tradesOrders;
+            }
+
+            if (openedOrders.Count > 0 || closedOrders.Count > 0)
+            {
+                AvailabilityOrdersChanged?.Invoke(this, new AvailabilityOrdersEventArgs(openedOrders, closedOrders));
+            }
+        }
+
+        private void _apiClient_ConnectionStateChanged(object sender, MtConnectionEventArgs e)
+        {
+            if (e.Status == MtConnectionState.Connected)
+            {
+                InitialCheck();
+                OnMtConnected();
+            }
+            else if (e.Status == MtConnectionState.Failed || e.Status == MtConnectionState.Disconnected)
+            {
+                OnMtDisconnected();
+            }
+        }
+
+        private void InitialCheck()
+        {
+            lock (_locker)
+            {
+                _prevOrders = null;
+            }
+
+            Task.Factory.StartNew(() =>
+            {
+                Check();
+            });
+        }
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/MtApi/MtApi.csproj b/MtApi/MtApi.csproj
index 0d0ef21b..1276ed05 100755
--- a/MtApi/MtApi.csproj
+++ b/MtApi/MtApi.csproj
@@ -60,6 +60,7 @@
   <ItemGroup>
     <Compile Include="ChartPeriod.cs" />
     <Compile Include="ExtensionMethods.cs" />
+    <Compile Include="Monitors\AvailabilityOrdersEventArgs.cs" />
     <Compile Include="MqlRates.cs" />
     <Compile Include="MtConnectionEventArgs.cs" />
     <Compile Include="MtConnectionException.cs" />
@@ -73,6 +74,7 @@
     <Compile Include="MtQuoteEventArgs.cs" />
     <Compile Include="MtTimeBar.cs" />
     <Compile Include="MtTypes.cs" />
+    <Compile Include="Monitors\TradeMonitor.cs" />
     <Compile Include="PriceConstantsType.cs" />
     <Compile Include="MarketInfoModeType.cs" />
     <Compile Include="MtApiClient.cs" />
@@ -98,6 +100,8 @@
     <Compile Include="Responses\ResponseBase.cs" />
     <Compile Include="SeriesIdentifier.cs" />
     <Compile Include="TimeBarArgs.cs" />
+    <Compile Include="Monitors\TimeframeTradeMonitor.cs" />
+    <Compile Include="Monitors\TimerTradeMonitor.cs" />
     <Compile Include="TradeOperation.cs" />
     <Compile Include="MtApiTimeConverter.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/MtApi/MtApiClient.cs b/MtApi/MtApiClient.cs
index 04b06838..bb1b947a 100755
--- a/MtApi/MtApiClient.cs
+++ b/MtApi/MtApiClient.cs
@@ -485,10 +485,10 @@ namespace MtApi
             return response != null ? response.Order : null;
         }
 
-        public IEnumerable<MtOrder> GetOrders(OrderSelectSource pool)
+        public List<MtOrder> GetOrders(OrderSelectSource pool)
         {
             var response = SendRequest<GetOrdersResponse>(new GetOrdersRequest { Pool = (int)pool });
-            return response != null ? response.Orders : null;
+            return response != null ? response.Orders : new List<MtOrder>();
         }
         #endregion
 
@@ -1490,8 +1490,7 @@ namespace MtApi
 
             if (changed)
             {
-                var handler = ConnectionStateChanged;
-                handler?.BeginInvoke(this, new MtConnectionEventArgs(state, message), (a) => handler.EndInvoke(a), null);
+                ConnectionStateChanged.FireEventAsync(this, new MtConnectionEventArgs(state, message));
             }
         }
 
@@ -1573,14 +1572,13 @@ namespace MtApi
         {
             if (quote != null)
             {
-                var handler = QuoteUpdated;
                 if (IsBacktestingMode)
                 {
-                    handler?.Invoke(this, quote.Instrument, quote.Bid, quote.Ask);
+                    QuoteUpdated?.Invoke(this, quote.Instrument, quote.Bid, quote.Ask);
                 }                    
                 else
                 {
-                    handler?.BeginInvoke(this, quote.Instrument, quote.Bid, quote.Ask, (a) => handler.EndInvoke(a), null);
+                    QuoteUpdated.FireEventAsync(this, quote.Instrument, quote.Bid, quote.Ask);
                 }                
             }
         }
@@ -1597,14 +1595,12 @@ namespace MtApi
 
         private void mClient_QuoteRemoved(MTApiService.MtQuote quote)
         {
-            var handler = QuoteRemoved;
-            handler?.BeginInvoke(this, new MtQuoteEventArgs(quote.Convert()), (a) => handler.EndInvoke(a), null);
+            QuoteRemoved.FireEventAsync(this, new MtQuoteEventArgs(quote.Convert()));
         }
 
         private void mClient_QuoteAdded(MTApiService.MtQuote quote)
         {
-            var handler = QuoteAdded;
-            handler?.BeginInvoke(this, new MtQuoteEventArgs(quote.Convert()), (a) => handler.EndInvoke(a), null);
+            QuoteAdded.FireEventAsync(this, new MtQuoteEventArgs(quote.Convert()));
         }
 
         private void _client_MtEventReceived(object sender, MtEventArgs e)
@@ -1623,8 +1619,7 @@ namespace MtApi
 
         private void FireOnLastTimeBar(MtTimeBar timeBar)
         {
-            var handler = OnLastTimeBar;
-            handler?.BeginInvoke(this, new TimeBarArgs(timeBar), (a) => handler.EndInvoke(a), null);
+            OnLastTimeBar.FireEventAsync(this, new TimeBarArgs(timeBar));
         }
 
         #endregion
diff --git a/TestClients/TestApiClientUI/Form1.cs b/TestClients/TestApiClientUI/Form1.cs
index 9c8f4d50..86f7183f 100644
--- a/TestClients/TestApiClientUI/Form1.cs
+++ b/TestClients/TestApiClientUI/Form1.cs
@@ -5,6 +5,7 @@ using System.Windows.Forms;
 using MtApi;
 using System.Threading.Tasks;
 using System.Linq;
+using MtApi.Monitors;
 
 namespace TestApiClientUI
 {
@@ -12,6 +13,8 @@ namespace TestApiClientUI
     {
         private readonly List<Action> _groupOrderCommands = new List<Action>();
         private readonly MtApiClient _apiClient = new MtApiClient();
+        private readonly TimerTradeMonitor _timerTradeMonitor;
+        private readonly TimeframeTradeMonitor _timeframeTradeMonitor;
 
         public Form1()
         {
@@ -29,6 +32,13 @@ namespace TestApiClientUI
 
             comboBox1.SelectedIndex = 0;
             comboBox2.SelectedIndex = 0;
+
+            _timerTradeMonitor = new TimerTradeMonitor(_apiClient);
+            _timerTradeMonitor.Interval = 1000; // 1 sec
+            _timerTradeMonitor.AvailabilityOrdersChanged += _tradeMonitor_AvailabilityOrdersChanged;
+
+            _timeframeTradeMonitor = new TimeframeTradeMonitor(_apiClient);
+            _timeframeTradeMonitor.AvailabilityOrdersChanged += _tradeMonitor_AvailabilityOrdersChanged;
         }
 
         private void initOrderCommandsGroup()
@@ -200,16 +210,20 @@ namespace TestApiClientUI
             int port;
             int.TryParse(textBoxPort.Text, out port);
 
+            _timerTradeMonitor.Start();
+            _timeframeTradeMonitor.Start();
+
             if (string.IsNullOrEmpty(serverName))
                 _apiClient.BeginConnect(port);
             else
                 _apiClient.BeginConnect(serverName, port);
-
-            OnConnected();
         }
 
         private void buttonDisconnect_Click(object sender, EventArgs e)
         {
+            _timerTradeMonitor.Stop();
+            _timeframeTradeMonitor.Stop();
+
             _apiClient.BeginDisconnect();
         }
 
@@ -1052,6 +1066,7 @@ namespace TestApiClientUI
             AddToLog(string.Format("ICustom result: {0}", retVal));
         }
 
+        //CopyRates
         private async void button24_Click(object sender, EventArgs e)
         {
             string symbol = textBoxSelectedSymbol.Text;
@@ -1078,6 +1093,7 @@ namespace TestApiClientUI
             }
         }
 
+        //CopyRates
         private async void button25_Click(object sender, EventArgs e)
         {
             string symbol = textBoxSelectedSymbol.Text;
@@ -1104,6 +1120,7 @@ namespace TestApiClientUI
             }
         }
 
+        //CopyRates
         private async void button26_Click(object sender, EventArgs e)
         {
             string symbol = textBoxSelectedSymbol.Text;
@@ -1130,6 +1147,7 @@ namespace TestApiClientUI
             }
         }
 
+        //Print
         private void button27_Click(object sender, EventArgs e)
         {
             var msg = textBoxPrint.Text;
@@ -1139,5 +1157,19 @@ namespace TestApiClientUI
                 AddToLog(string.Format("Print executed"));
             }
         }
+
+        private void _tradeMonitor_AvailabilityOrdersChanged(object sender, AvailabilityOrdersEventArgs e)
+        {
+            if (e.Opened != null)
+            {
+                AddToLog($"{sender.GetType()}: Opened orders - {string.Join(", ", e.Opened.Select(o => o.Ticket).ToList())}");
+            }
+
+            if (e.Closed != null)
+            {
+                AddToLog($"{sender.GetType()}: Closed orders - {string.Join(", ", e.Closed.Select(o => o.Ticket).ToList())}");
+            }
+        }
+
     }
 }