private async System.Threading.Tasks.Task selectSchedule(ScheduleTrade trade)
        {
            var page = new TradeSelectPage();

            page.BindingContext = new TradeSelectViewModel(_viewModel.StartDate, trade);
            await((MainPage)App.Current.MainPage).NavigateTo(page, true);
        }
        private async void TradeForButtonItem_Clicked(object sender, EventArgs e)
        {
            var menuButtonItem = sender as MenuButtonItem;
            var page           = new TradeSelectPage();

            page.BindingContext = new TradeSelectViewModel(_viewModel.StartDate, menuButtonItem.CommandParameter as ScheduleTrade);
            await((MainPage)App.Current.MainPage).NavigateTo(page, true);
        }