calling flatten from Indicator

[WHICKED]

Account.Flatten(new [] { this.Instrument });

is there a way when executing this command from a indicator that it can check that the flatten executed successfully and then execute other code?
it appears that this call will freeze NT as it takes 'time' to execute the command. However it is not synchronous and once called it will return immediately and continue with processing other commands.

[NinjaTrader_Jesse]

Hello WHICKED,

There is not any kind of return for that method so that specifically would not be possible. You could write logic that has a delay which checks the account position collection after doing that to see if any positions on the instrument still exist.

https://ninjatrader.com/support/helpGuides/nt8/positions_account.htm

[WHICKED]

what would be the best way to get the instrument position then close out all corresponding positions and any ATM strategies etc.

calling .Flatten seems to cause issues and freezes when using it in a Indicator.

as well Position.Close("","") also seems to freeze when called.

[WHICKED]

literally calling Flatten or Position.Close from an indicator - causes the entire NT to freeze and lock requiring a restart.

[NinjaTrader_Jesse]

Hello WHICKED,

What specific code are you using when you call Flatten? Are you using the addon framework to first find an account and save it to a variable? The code originally posted is the unsupported for as that uses the strategy Account property. Your code should look similar to:

//find account:

lock (Account.All)
myAccount = Account.All.FirstOrDefault(a => a.Name == "Sim101");

//later

myAccount.Flatten(new [] { Instrument.GetInstrument("ES 12-24") });

This could also relate to how your script is operating logically in case it is calling that method more than 1 time.

[WHICKED]

ok the reason it is freezing is that I am needing to get the NinjaTrader.Gui.Tools.AccountSelector chartTraderAccountSelector = null;
NinjaTrader.Gui.NinjaScript.AtmStrategy.AtmStrateg ySelector chartTraderATMSelector

and

myAccount = Account.All.FirstOrDefault(a => a.Name == chartTraderAccountSelector.SelectedAccount.Display Name);
p = myAccount.GetPosition(instrumentId);

however, since this is a indicator - it is on a different thread then the charttrader, gui, etc. so I MUST use a Dispatcher to get the information.

However, I MUST be able to get the values back from those selectors by using this.Dispatcher.Invoke or ChartControl.Dispatcher.Invoke -- this call causes a deadlock issue and InvokeAsync won't work because it can not guarantee that it will get the information back in time.

why is threading SUCH an issue with NT? is there a solution to this?

[NinjaTrader_Jesse]

Hello WHICKED,

Using invoke is incorrect and causes freezing, you need to use InvokeAsync for any UI thread manipulations. InvokeAsync is the only correct way to use the UI so you would need to change how you have coded that portion of the script, all code that you need to use the UI value needs to go inside the dispatcher so it happens at a later time when the thread is available.

This is not specific to NT, any C# application has the same stipulations for threading and UI access. You need to use the correct approach to execute code on different threads so it does not cause deadlocks.