why the following has to be called within ChartControl.Dispa

[judysamnt7]

Hi Bltdavid or Chelsea:

can any of you explain why the following has to be called within ChartControl.Dispatcher.InvokeAsync () ? Can I just place all codes within OnButtonClick() with using InvokeAsync?
much appreciated !

{
ChartControl.Dispatcher.InvokeAsync((Action)(() => {

Account a = ChartControl.OwnerChart.ChartTrader.Account;
int quantity = ChartControl.OwnerChart.ChartTrader.Quantity;
AtmStrategy atm = ChartControl.OwnerChart.ChartTrader.AtmStrategy;
Instrument instr = ChartControl.OwnerChart.ChartTrader.Instrument;
Order order1 = a.CreateOrder(instr, OrderAction.Buy,
OrderType.Market, OrderEntry.Automated, TimeInForce.Day, quantity, 0, 0, "", "Entry",
Core.Globals.MaxDate, null);


Order order2 = a.CreateOrder(Cbi.Instrument.GetInstrument ("NQ 12-24"), OrderAction.SellShort,
OrderType.Market, OrderEntry.Automated, TimeInForce.Day, quantity, 0, 0, "", "Entry",
Core.Globals.MaxDate, null);

if (atm == null)
// was set to 'None'
a.Submit(new[] { order1,order2 });


}));
}

[NinjaTrader_ChelseaB]

Hello judysamnt7,

Anything that runs on the UI thread needs to be accessed from the ChartControl dispatcher with InvokeAysnc().

When modifying the WPF of a chart, such as placing a button, or when using ChartControl objects the dispatcher must be used.

The account, does not need to be accessed with a dispatcher to send orders, but is generally thread-safe and can be within a dispatcher.

Below is a link to an example that submits orders with button clicks.

https://support.ninjatrader.com/s/article/Chart-Order-Buttons