Set ChartTrader Order Quantity via script

[sidlercom80]

Hi, is it possible to access the chart trader to set the order Qty per script, e.g. from an indicator?

chartTrader = chartWindow.FindFirst("ChartWindowChartTraderControl") as ChartTrader;
chartTrader.OrderQty ???

[NinjaTrader_Jim]

Hello sidlercom80,

Thanks for your question, yes this is possible.

Please see the example attached for capturing ChartTrader controls for using in code.

If you want to programmatically change a property of this control, you will need to use ChartControl.Dispatcher.InvokeAsync() since the element would reside on the chart's UI thread.

Let us know if there is anything else we can do to help.

[sidlercom80]

Thanks Jim, for your demo file. I'm trying to set a binding (Two Way) correctly so that via NotifyPropertiechanged event handler in the Base class, the propertie is updated both in the chart trader (UI) and the properties directly. Unfortunately, I can't quite get the binding right. Everything works except for setting the "quantitySelector.Value" directly via the binding. Do you have a tip for me?

// find the ChartTrader quantity selector by AutomationID
quantitySelector = chartWindow.FindFirst("ChartTraderControlQuantitySelector") as QuantityUpDown;
if (quantitySelector != null)
   {
       quantitySelector.ValueChanged += QuantitySelector_ValueChanged;
       currentQuantity = quantitySelector.Value;
        //set binding to our OrderQty property in base class
        quantitySelector.SetBinding(QuantityUpDown.ValueProperty, new Binding
                {      
                        Source = ???
                        Path = new PropertyPath("OrderQty"),
                        Mode = BindingMode.TwoWay,
                        UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
                    });
     }

The OrderQty propertie is the property in the base class that is to update itself.

[NinjaTrader_Jim]

Hello sidlercom80,

The closest example we have shows a class inheriting from INotifyPropertyChanged and uses XAML to describe bindings.

This is a bit of an advanced example that goes beyond our scope of support, so we may recommend checking out other publicly available WPF resources on binding.

If you happen to accomplish your goal, your feedback may be useful for the community, so please write back!

[sidlercom80]

For those who are interested, here is my solution:

Base class:

public int SelectedOrderQty
{
    get { return selectedOrderQty; }
    set
         {
             if (selectedOrderQty != value)
             {
                 selectedOrderQty = Math.Max(1, value);
                 NotifyPropertyChanged();
              }
          }
}


[XmlIgnore, Browsable(false)] public object PropertyBase { get { return this; } }

View class:

//find the ChartTrader quantity selector by AutomationID
quantitySelector = chartWindow.FindFirst("ChartTraderControlQuantitySelector") as QuantityUpDown;
if (quantitySelector != null)
{
  //set binding to our OrderQty property in the base class
  quantitySelector.SetBinding(QuantityUpDown.ValueProperty, new Binding
     {
           Source = PropertyBase,
           Path = new PropertyPath("SelectedOrderQty"),
           Mode = BindingMode.TwoWay,
           UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
      });
}