Set parameter checkbox unchecked by default for Exponential Moving Average

Hi, I want to know how can I set the output of an Exponential Moving Average unchecked to not be displayed on the chart as default.

I have like 3 EMAs but let's say the EMA 50 I want to not be displayed as default , but if I go to the settings parameters where the checkbox is , to be also allowed to check the checkbox in order to show EMA50.

And another question , after I finish my indicator , how can I deploy it like to be available in the public library ? so others could use it , and also is there a way to deploy it as private so only me and invited people could use it ?

So I have this : 

[Parameter("EMA 50" , DefaultValue=50)]

public int Periods50 {get; set;}



[Output("EMA50", LineColor="Blue")]

public IndicatorDataSeries EMA50Result {get; set;}



ExponentialMovingAverage EMA50



protected override void Initialize() 

{

EMA50 = Indicators.ExponentialMovingAverage(Bars.ClosePrices, Periods50);

}



public override void Calculate(int index)

{

EMA50Result[index] = EMA50.Result[index]

}