Porting NT7-->NT8, not getting something here

[cgeorgan]

Hey-

I'm just getting used to NT8 and I'm working to port an NT7 strategy over.

I've created a list that houses a bunch of instances of MyIndicator:

private List<MyIndicator>MyIndicators = new List<MyIndicator>();

Now if I'm correct, I should be waiting until State.DataLoaded() is called. Then I try to assign an instance of MyIndicator to my list, going through BarsArray[] to do it:

if (State == State.DataLoaded)
{
	for (int i = 0; i < BarsArray.Count(); i++)
	{
              MyIndicators.Add(MyIndicator(BarsArray[i], foo1, foo2, foo3, foo4, foo5));
        }
}

This is not working as it did in NT7. In NT7, this code was run within "OnStartup()". The compiler error says:

"No overload for method "MyIndicator" takes 6 arguments."

In NT7, I would later update these indicators in "OnBarUpdate() in the following fashion (though I haven't gotten to porting this portion):

MyIndicators[BarsInProgress] = MyIndicator(BarsArray[BarsInProgress], foo1, foo2, foo3,foo4, foo5);

Can't figure out what in the heck I'm doing. I'm sure it's something simple. Thoughts?

Thanks!

[NinjaTrader_Jesse]

Hello,

The error

"No overload for method "MyIndicator" takes 6 arguments."

would indicate that your call to the indicator is not correctly formed:

MyIndicators.Add(MyIndicator(BarsArray[i], foo1, foo2, foo3, foo4, foo5));

Specifically that it does not take 6 arguments, that would mean it likely takes less than or greater than 6 arguments.

You could type the indicators name MyIndicator followed by the parenthesis MyIndicator( and you should see the available usages in the intelleprompt window.

I look forward to being of further assistance

[cgeorgan]

Hello,

The error would indicate that your call to the indicator is not correctly formed:

MyIndicators.Add(MyIndicator(BarsArray[i], foo1, foo2, foo3, foo4, foo5));

Specifically that it does not take 6 arguments, that would mean it likely takes less than or greater than 6 arguments.

You could type the indicators name MyIndicator followed by the parenthesis MyIndicator( and you should see the available usages in the intelleprompt window.

I look forward to being of further assistance

Thank you for the assistance.

As it turns out, I was using the old NT7 methods in the indicator. That is:

#region Properties
[Description("Long Term Rate of Change EMA Period")]
[Category("Parameters")]
public int LT_ROC_EMA_Period
{
       get { return lT_ROC_EMA_Period; }
       set { lT_ROC_EMA_Period = Math.Max(1, value); }
}
#endregion

This compiles and works fine when I put the indicator on a chart, so I figured it wouldn't be a problem if I called the indicator from a script.

None of that was recognized when being called from within the script in NT8, however. When I went to initiate the indicator with no arguments, it worked fine.

So I updated the methods with the NT8 way of doing it:

#region Properties
[Range(1, int.MaxValue), NinjaScriptProperty]
[Display(ResourceType = typeof(Custom.Resource), Name = "Long Term Rate of Change EMA Period", GroupName = "NinjaScriptParameters", Order = 0)]
public int LT_ROC_EMA_Period  { get; set; }
#endregion

This works now.