public ApplicationSettings()
        {
            ServerUrl          = "https://ciapipreprod.cityindextest9.co.uk/tradingapi";
            StreamingServerUrl = "https://pushpreprod.cityindextest9.co.uk/CITYINDEXSTREAMING";
            UserName           = "******";
            Password           = "******";

            NewsMaxCount = 30;
            NewsCategory = "NEWS.MOCKHEADLINES.UK";

            GraphPeriodSecs = 300;

            PricesToWatch = new ApiMarketDTO[0];
        }
        private void ImageAdd_Click(object sender, MouseButtonEventArgs e)
        {
            var items = AllMarketsGrid.SelectedItems;

            foreach (ApiMarketDTO market in items)
            {
                var newSubscription = new ApiMarketDTO {
                    MarketId = market.MarketId, Name = market.Name
                };

                for (var i = 0; i < _subscriptions.Count; i++)
                {
                    var cur = _subscriptions[i];
                    if (cur.MarketId == newSubscription.MarketId)
                    {
                        _subscriptions.RemoveAt(i);
                        break;
                    }
                }
                _subscriptions.Add(newSubscription);
            }
        }