/// <summary>
        /// Request historical prices for the specified timeframe of the specified period
        /// and then show live prices.
        /// </summary>
        /// <param name="communicator">The price history communicator.</param>
        /// <param name="instrument">The instrument.</param>
        /// <param name="timeframe">The timeframe.</param>
        /// <param name="from">From-date.</param>
        /// <param name="to">To-date</param>
        /// <param name="quotesCount">The quotes count.</param>
        /// <param name="responseListener">The response listener.</param>
        /// <param name="session">The trading session.</param>
        /// <param name="sessionListener">The trading session listener.</param>
        public static void GetLivePrices(IPriceHistoryCommunicator communicator, string instrument, string timeframe,
                                         DateTime from, DateTime to, int quotesCount, ResponseListener responseListener,
                                         O2GSession session, SessionStatusListener sessionListener)
        {
            if (!communicator.isReady())
            {
                Console.WriteLine("History communicator is not ready.");
                return;
            }

            // create timeframe entity
            ITimeframeFactory timeframeFactory = communicator.TimeframeFactory;
            O2GTimeframe      timeframeObj     = timeframeFactory.create(timeframe);

            // check timeframe for ticks
            if (O2GTimeframeUnit.Tick == timeframeObj.Unit)
            {
                throw new Exception("Application works only for bars. Don't use tick as timeframe.");
            }

            // load Offers table and start ticks listening
            PriceUpdateController priceUpdateController = new PriceUpdateController(session, instrument);

            if (!priceUpdateController.Wait())
            {
                return;
            }

            // create period collection
            bool             alive   = true;
            PeriodCollection periods = new PeriodCollection(instrument, timeframe, alive, priceUpdateController);

            PeriodCollectionUpdateObserver livePriceViewer = new PeriodCollectionUpdateObserver(periods);

            // create and send a history request
            IPriceHistoryCommunicatorRequest request = communicator.createRequest(instrument, timeframeObj, from, to, quotesCount);

            responseListener.SetRequest(request);
            communicator.sendRequest(request);

            // wait results
            responseListener.Wait();

            IPriceHistoryCommunicatorResponse   response = responseListener.GetResponse();
            O2GMarketDataSnapshotResponseReader reader   = communicator.createResponseReader(response);

            if (response != null)
            {
                ProcessHistoricalPrices(communicator, response, ref periods);
            }

            // finally notify the collection that all bars are added, so it can
            // add all ticks collected while the request was being executed
            // and start update the data by forthcoming ticks
            periods.Finish(reader.getLastBarTime(), reader.getLastBarVolume());

            // continue update the data until cancelled by a user
            Console.WriteLine("\nPress ENTER to cancel.\n\n");
            Console.ReadKey();

            livePriceViewer.Unsubscribe();
            priceUpdateController.Unsubscribe();
        }
        static void Main(string[] args)
        {
            O2GSession session = null;
            IPriceHistoryCommunicator communicator   = null;
            SessionStatusListener     statusListener = null;
            bool loggedIn = false;

            try
            {
                Console.WriteLine("GetLivePrices sample\n");

                ArgumentParser argParser = new ArgumentParser(args, "GetLivePrices");

                argParser.AddArguments(ParserArgument.Login,
                                       ParserArgument.Password,
                                       ParserArgument.Url,
                                       ParserArgument.Connection,
                                       ParserArgument.SessionID,
                                       ParserArgument.Pin,
                                       ParserArgument.Instrument,
                                       ParserArgument.TimeFrame,
                                       ParserArgument.DateFrom,
                                       ParserArgument.DateTo,
                                       ParserArgument.QuotesCount,
                                       ParserArgument.OpenPriceCandlesMode);

                argParser.ParseArguments();

                if (!argParser.AreArgumentsValid)
                {
                    argParser.PrintUsage();
                    return;
                }

                argParser.PrintArguments();

                LoginParams  loginParams  = argParser.LoginParams;
                SampleParams sampleParams = argParser.SampleParams;

                // use the application module path as a base path for quotes storage
                string storagePath = System.IO.Path.Combine(AppContext.BaseDirectory, "History");

                // create the ForexConnect trading session
                session        = O2GTransport.createSession();
                statusListener = new SessionStatusListener(session, loginParams.SessionID, loginParams.Pin);
                // subscribe IO2GSessionStatus interface implementation for the status events
                session.subscribeSessionStatus(statusListener);
                statusListener.Reset();

                // create an instance of IPriceHistoryCommunicator
                communicator = PriceHistoryCommunicatorFactory.createCommunicator(session, storagePath);

                // log in to ForexConnect
                session.login(loginParams.Login, loginParams.Password, loginParams.URL, loginParams.Connection);
                if (statusListener.WaitEvents() && statusListener.Connected)
                {
                    loggedIn = true;

                    CommunicatorStatusListener communicatorStatusListener = new CommunicatorStatusListener();
                    communicator.addStatusListener(communicatorStatusListener);

                    // wait until the communicator signals that it is ready
                    if (communicator.isReady() ||
                        (communicatorStatusListener.WaitEvents() && communicatorStatusListener.Ready))
                    {
                        // attach the instance of the class that implements the IPriceHistoryCommunicatorListener
                        // interface to the communicator
                        ResponseListener responseListener = new ResponseListener();
                        communicator.addListener(responseListener);

                        GetLivePrices(communicator, sampleParams.Instrument, sampleParams.Timeframe,
                                      sampleParams.DateFrom, sampleParams.DateTo, sampleParams.QuotesCount, responseListener,
                                      session, statusListener);
                        Console.WriteLine("Done!");

                        communicator.removeListener(responseListener);
                    }

                    communicator.removeStatusListener(communicatorStatusListener);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception: {0}", e.ToString());
            }
            finally
            {
                if (communicator != null)
                {
                    communicator.Dispose();
                }
                if (session != null)
                {
                    if (loggedIn)
                    {
                        try
                        {
                            statusListener.Reset();
                            session.logout();
                            statusListener.WaitEvents();
                        }
                        catch (Exception)
                        {
                        }
                    }

                    session.unsubscribeSessionStatus(statusListener);
                    session.Dispose();
                }
            }
        }
        static void Main(string[] args)
        {
            O2GSession session = null;
            IPriceHistoryCommunicator communicator   = null;
            SessionStatusListener     statusListener = null;
            bool loggedIn = false;

            try
            {
                LoginParams  loginParams  = new LoginParams(ConfigurationManager.AppSettings);
                SampleParams sampleParams = new SampleParams(ConfigurationManager.AppSettings);

                PrintSampleParams("GetLivePrices", loginParams, sampleParams);

                // use the application module path as a base path for quotes storage
                string storagePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "History");

                // create the ForexConnect trading session
                session        = O2GTransport.createSession();
                statusListener = new SessionStatusListener(session, loginParams.SessionID, loginParams.Pin);
                // subscribe IO2GSessionStatus interface implementation for the status events
                session.subscribeSessionStatus(statusListener);
                statusListener.Reset();

                // create an instance of IPriceHistoryCommunicator
                communicator = PriceHistoryCommunicatorFactory.createCommunicator(session, storagePath);

                // log in to ForexConnect
                session.login(loginParams.Login, loginParams.Password, loginParams.URL, loginParams.Connection);
                if (statusListener.WaitEvents() && statusListener.Connected)
                {
                    loggedIn = true;

                    CommunicatorStatusListener communicatorStatusListener = new CommunicatorStatusListener();
                    communicator.addStatusListener(communicatorStatusListener);

                    // wait until the communicator signals that it is ready
                    if (communicator.isReady() ||
                        (communicatorStatusListener.WaitEvents() && communicatorStatusListener.Ready))
                    {
                        // attach the instance of the class that implements the IPriceHistoryCommunicatorListener
                        // interface to the communicator
                        ResponseListener responseListener = new ResponseListener();
                        communicator.addListener(responseListener);

                        GetLivePrices(communicator, sampleParams.Instrument, sampleParams.Timeframe,
                                      sampleParams.DateFrom, sampleParams.DateTo, sampleParams.QuotesCount, responseListener,
                                      session, statusListener);
                        Console.WriteLine("Done!");

                        communicator.removeListener(responseListener);
                    }

                    communicator.removeStatusListener(communicatorStatusListener);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception: {0}", e.ToString());
            }
            finally
            {
                if (communicator != null)
                {
                    communicator.Dispose();
                }
                if (session != null)
                {
                    if (loggedIn)
                    {
                        try
                        {
                            statusListener.Reset();
                            session.logout();
                            statusListener.WaitEvents();
                        }
                        catch (Exception ee)
                        {
                        }
                    }

                    session.unsubscribeSessionStatus(statusListener);
                    session.Dispose();
                }
            }
        }