Help with Can't convert Double to Data Series

[Taddypole]

I'm working with the indicator "TriggerLines".

I'm trying to develop a Trigger Strength and a Trigger Strength Average plot.
The Trigger Strength plot works.

But on line 65, when I try to calculate the TrgStrengthAvg using an EMA, I get an error.

"Argument'1': cannot convert from 'double' to Ninja Trader.Data.IDataSeries"

I do not understand what this error is telling me.

Can someone help?

Thanks,
taddypole...

[NinjaTrader_Brett]

Hello,

Thank you for your note.

EMA() can only take a DataSeries as an input, you cannot input a double variable here. A DataSeries object is any Close[0], Open[0], Low[0], High[0], Volume[0], or a custom one you would create. To create a custom one to use in a EMA please see the information below:

http://www.ninjatrader.com/support/helpGuides/nt7/dataseries_class.htm?zoom_highlightsub=dataSeries

Let me know if I can be of further assistance.

[Taddypole]

Thank you Brett,

On line 68, i change the TrgStrengthAvg to an IDataseries but then it told me that TrigerStrength needed to be a IDataseries also. So I changed TrigerStrength on line 67 to a IDataSeries as well but now get an error message...

"Cannot implicitly convert type 'double' to NinjaTrader.Data.DataSeries."

Intellisense tells me that all the variables in line 67 are data series. why does it tell me that i'm trying to convert a type double?


Thank you...

[NinjaTrader_Brett]

Hello,

I still see the same error in the file.

TrigerStrength=(LinRegCurve[0]-LinRegCurveAvg[0]) * 10000;
TrgStrengthAvg=EMA(TrigerStrength,TSPeriod);


Issue is here: EMA(TrigerStrength - TrigerStrength needs to be a data series however it is currently a double variable. DataSeries must always be set, meaning the line above it would need to read TrigerStrength.Set(); You do not use = signs to set DataSeries objects.

Also, you need to add a [0] at the end of the EMA() function.

Let me know if I can be of further assistance.

[Taddypole]

Brett,

I followed your advice and used the "Set" on both TrigerStrength and TrgStrengthAvg as they are both DataSeries objects.

And Intellisense seems to indicate they are both dataseries objects. But i continue to get an error that it cannot convert EMA to double.

[NinjaTrader_Brett]

Hello,

You wernt quite consitant with all the data series.

I made the last few changes you were missing to compile here are the changed lines: Had to add [0]'s as they are now data series objects and had to move the [0] on your TrgStrengthAvg.Set in one parenthesis.

TrgStrengthAvg.Set(EMA(TrigerStrength,TSPeriod)[0]);

TrgStrength.Set(TrigerStrength[0]);
TrgStrAvgPlot.Set(TrgStrengthAvg[0]);

Let me know if I can be of further assistance.

[Taddypole]

Thank you very much Brett...

You have been very helpful..!!

[NinjaTrader_Brett]

Hello,

No problem have a great rest of the day and happy trading.

[Taddypole]

Sorry Brett,

Had one other question about this code.

After modifying this code, i now have a bunch of extra/erroneous Plots in the properties window of that indicator.

As i modified code these never updated and reflect the old code i started with.
How do i update or refresh those so they reflect my current plots?

Thanks,
taddypole...

[NinjaTrader_Brett]

Hello,

The plots that show up here are ones that are added in Initilize() with the Add call. Remove these if you no longer want them added.

Also expand the parameters section and remove them from there as well.

Let me know if I can be of further assistance.

[Taddypole]

That's what's puzzling.

In the initialize() i only have the following:

Add(new Plot(Color.Cyan, "TrgStrength"));
Add(new Plot(Color.Magenta, "TrgStrAvgPlot"));
Add(new Line(Color.Black, 0, "Zero line"));

and if i look in the "Catagory "Pararameters"" section... i don't see anything relative to those plots?

[NinjaTrader_Brett]

Hello,

Have you tried removing it and the adding it? As this is the only time the plots are loaded.

I look forward to assisting you further.

[Taddypole]

Thanks Brett,

I tried removing and adding the indicator... and that didn't work.
I then shut down Ninja Trader and reloaded... that didn't work.

I then renamed the indicator and that worked.

???

Not sure what that all means.. but i'm good now.

Thanks for all your help...