best efficiency when one indicator is called by another indicator

[microsat]

Inside an indicator, I want to call another indicator.
My code is below

protected override void OnBarUpdate()
{
    double x = EMA(5)[0];
}

My question is
Suppose CurrentBar be y, each time OnBarUpdate is triggerred, EMA(5) will be calculated from 1 (y bars before) to y (CurrentBar), won't it?

I guess it will not be recalculated each time. So is the above code same efficient as
the following code?

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    double x = ema[0];
}

My second question is
are the following two codes same efficiency?

protected override void OnBarUpdate()
{
    if (CurrentBar  % 1000 == 0)    
         double x = EMA(5)[0];
}

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    if (CurrentBar  % 1000 == 0) 
        double x = ema[0];
}

Will one of them get jammed in the 1000th bar because it needs to recalculate 1000 bars' EMA in just a short time (suppose the timeframe is one second)?

My third question is if one of the following two codes will calculate EMA(5) for five times in one bar.

protected override void OnBarUpdate()
{
    for (int i=0; i<5;i++)
         double x = EMA(5)[0];
}

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    for (int i=0; i<5;i++)
        double x = ema[0];
}

Thank you.

[koganam]

Inside an indicator, I want to call another indicator.
My code is below

protected override void OnBarUpdate()
{
    double x = EMA(5)[0];
}

My question is
Suppose CurrentBar be y, each time OnBarUpdate is triggerred, EMA(5) will be calculated from 1 (y bars before) to y (CurrentBar), won't it?

I guess it will not be recalculated each time. So is the above code same efficient as
the following code?

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    double x = ema[0];
}

My second question is
are the following two codes same efficiency?

protected override void OnBarUpdate()
{
    if (CurrentBar  % 1000 == 0)    
         double x = EMA(5)[0];
}

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    if (CurrentBar  % 1000 == 0) 
        double x = ema[0];
}

Will one of them get jammed in the 1000th bar because it needs to recalculate 1000 bars' EMA in just a short time (suppose the timeframe is one second)?

My third question is if one of the following two codes will calculate EMA(5) for five times in one bar.

protected override void OnBarUpdate()
{
    for (int i=0; i<5;i++)
         double x = EMA(5)[0];
}

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    for (int i=0; i<5;i++)
        double x = ema[0];
}

Thank you.

Using the named instance will always be more efficient.

[NinjaTrader_MichaelM]

Hello microsat,

Thank you for writing in. Koganam is correct, using the named instance will be most efficient.

For example:

protected override void Initialize()
{
    ema = EMA(5);
}
protected override void OnBarUpdate()
{
    double x = ema[0];
}

Please let me know if you have any further questions.