code error

[Picita]

Hi,
I can not write this simple code:


private double a = 0;
private double sig = 0;
private int gg = 5;
....

a = Median[0] - SMA(SMA(Median(), gg)[0], 2*gg)[0] ;

sig = SMA(A,2*gg);


if ( a > sig )
GoLong();


if (sig < a)
GoShort();

It gives me an error on the allocation of the argument of Sma
that must be "data id" tipe.

how can I solve the problem?
Tanks

[NinjaTrader_RyanM1]

Hello picita,

SMA can accept a data series as input, not a double value.

This tutorial can help you create your own custom data series.

[Picita]

Thanks, I'll watch it very carefully.

[Picita]

I would like to calculate for each bar, the following expression without
have the error of incorrect allocation of a type IdData with a double.

a = (Median[0]-SMA(SMA(Median[0],gg),gg*2));
Sig = SMA(a,gg*2);
//gg is a variable input with default = 5

I tried to write the following code that is in the help of NT:

#region Variables
private DataSeries myDataSeries; // Declare a DataSeries variable
#endregion

protected override void Initialize()
{
myDataSeries = new DataSeries(this);
}
protected override void OnBarUpdate()
{
myDataSeries.Set(Close[0] - Open[0]);
Plot0.Set(SMA(SMAPeriod)[0] + myDataSeries[0]);
}

in this case gives me the following error

impossible to apply the operator -

I do not know how to get out.

[NinjaTrader_RyanM1]

Hello Picita,

I successfully compiled the code you submitted from the help guide.

Anything that you pass into SMA as an input needs to be a DataSeries - > Median, a, and Sig

When you apply indexing [0] to a data series, it becomes a double.

Try first simple and then complexity. Work from the tutorial to create one data series and then pass this data series into SMA.


Example:

#region Variables
private DataSeries myDataSeries; // Declare a DataSeries variable
#endregion

protected override void Initialize()
{
myDataSeries = new DataSeries(this);
}
protected override void OnBarUpdate()
{
myDataSeries.Set(Close[0] - Open[0]);
Plot0.Set(SMA(myDataSeries, 14)[0]);

}

[Picita]

Ok
the code from help guide is right
but if I which to plot this (or calculate):

a = Median[0] - SMA(SMA(Median(), gg)[0], 2*gg)[0] ;
sig = SMA(a,2*gg);
plot0.set(sig);

how many and which steps I have to do to convert double type in IData types?

is a bit complicated
or no?

Hello Picita,

I successfully compiled the code you submitted from the help guide.

Anything that you pass into SMA as an input needs to be a DataSeries - > Median, a, and Sig

When you apply indexing [0] to a data series, it becomes a double.

Try first simple and then complexity. Work from the tutorial to create one data series and then pass this data series into SMA.


Example:

#region Variables
private DataSeries myDataSeries; // Declare a DataSeries variable
#endregion

protected override void Initialize()
{
myDataSeries = new DataSeries(this);
}
protected override void OnBarUpdate()
{
myDataSeries.Set(Close[0] - Open[0]);
Plot0.Set(SMA(myDataSeries, 14)[0]);

}

[NinjaTrader_Bertrand]

Picita, the SMA takes only dataseries as input, you cannot pass a double value in - have you given Ryan's example a try?

We also have a dedicated reference sample for working with DateSeries objects - http://www.ninjatrader.com/support/f...ead.php?t=7299

[Picita]

sorry
but if I have to create a Dataseries Object with SMA argument?
is it possible?
that's what I do

[NinjaTrader_Bertrand]

Picita, the a and the sig from the code you posted are double variables in your code, you would need to create them as DataSeries instead and then use the .Set method to populate them with your custom values, so you could then pass those series to the SMA method.

http://www.ninjatrader-support.com/HelpGuideV6/DataSeriesObject.html