private IEnumerable<ExchangeDataViewModel> CreateData()
        {
            ExchangeDataViewModel[] data = new ExchangeDataViewModel[2];
            data[0] = CreateForexData("EUR/USD");
            data[1] = CreateForexData("EUR/GBP");

            return data;
        }
        private ExchangeDataViewModel CreateForexData(string name)
        {
            DateTime now = DateTime.Now;

            ExchangeDataViewModel exchangeData = new ExchangeDataViewModel();
            exchangeData.StartDate = now.Subtract(TimeSpan.FromDays(365d));
            exchangeData.EndDate = now;
            exchangeData.Name = name;
            exchangeData.Data = CreateExchangeData(exchangeData.StartDate, exchangeData.EndDate);

            return exchangeData;
        }