NinjaTrader 8 Beta 2 OnCalculateMinMax() And CalculateMinMax()

[RJay]

.
I have tried all examples of these Methods from the "Help" documentation for NT8 for OnCalculateMinMax() And CalculateMinMax() and none of these Method examples will compile. Is there a problem here?

----------------------------------------------------------------------------------------------------------------

public override void OnCalculateMinMax()
{
//It is important to set MinValue and MaxValue to the min/max Y values
//in order for your object to support auto scale
MinValue=Anchor.YDataValue;
MaxValue=Anchor.YDataValue;
}


-------------------------------------------------------------------------------------------------------

protected override void OnStateChange()
{
if (State == State.SetDefaults)
{

IsAutoScale = true; // set this to true to call CalculateMinMix() to ensure drawing tool is fully rendered in chart scale
}
}

public override void CalculateMinMax()
{
// It is important to set MinValue and MaxValue to the min/max Y values your drawing tool uses if you want it to support auto scale
foreach (ChartAnchor anchor in Anchors)
{
MinValue = Math.Min(anchor.YDataValue, MinValue);
MaxValue = Math.Max(anchor.YDataValue, MaxValue);
}
}

---------------------------------------------------------------------------------------------------------


public override void OnCalculateMinMax()
{
//It is important to set MinValue and MaxValue to the min/max Y values
//in order for your object to support auto scale
MinValue=Anchor.YDataValue;
MaxValue=Anchor.YDataValue;
}
.

[NinjaTrader_Matthew]

The OnCalculateMinMax() documentation referrers to "Chart Anchors" which are part of DrawingTools, I'll have that updated to work within the context of the indicators.

Here is a basic example of what you'd be doing in an indicator

public override void OnCalculateMinMax()
{		
	//Set the charts min/max values to 50 Ticks above/below MyPlot
	MinValue = MIN(MyPlot, 50)[0] - 50 * TickSize;
	MaxValue = MAX(MyPlot, 50)[0] + 50 * TickSize;
}

[RJay]

Hi Matthew,

Thank you for making the changes described to the documentation.

Please take this code sample you posted here and place it inside an indicator and compile.

You will then see why I posted a possible bug report.

RJay

The OnCalculateMinMax() documentation referrers to "Chart Anchors" which are part of DrawingTools, I'll have that updated to work within the context of the indicators.

Here is a basic example of what you'd be doing in an indicator

public override void OnCalculateMinMax()
{        
    //Set the charts min/max values to 50 Ticks above/below MyPlot
    MinValue = MIN(MyPlot, 50)[0] - 50 * TickSize;
    MaxValue = MAX(MyPlot, 50)[0] + 50 * TickSize;
}

[NinjaTrader_Matthew]

That works for me as long as I have a MyPlot series... what error are you getting?

The min/max needs to be anchored to some price point, I suppose you can replace that with Close for demonstration purposes.

public override void OnCalculateMinMax()
{        
    //Set the charts min/max values to 50 Ticks above/below MyPlot
    MinValue = MIN(Close, 50)[0] - 50 * TickSize;
    MaxValue = MAX(Close, 50)[0] + 50 * TickSize;
}

[RJay]

Errors in compiler as follows:
-----------------------------------------------------------------

Statement expected.

Class, delegate, interface, or struct expected.

External alias declarations, using clauses, assembly module attributes, or namespace/type declarations expected.

------------------------------------------------------------------

Can you please post your indicator's listing of #region Using declarations.

Thanks.

That works for me as long as I have a MyPlot series... what error are you getting?

The min/max needs to be anchored to some price point, I suppose you can replace that with Close for demonstration purposes.

public override void OnCalculateMinMax()
{        
    //Set the charts min/max values to 50 Ticks above/below MyPlot
    MinValue = MIN(Close, 50)[0] - 50 * TickSize;
    MaxValue = MAX(Close, 50)[0] + 50 * TickSize;
}

[NinjaTrader_Matthew]

Attached is a complete indicator which overrides OnCalculateMinMax

[RJay]

OK, that sample works. Thanks. I can manage from here.

[NinjaTrader_JessicaP]

Hello meinl, and thank you for your queries.

We have updated the Help Guide example for OnCalculateMinMax. Please let us know if there are any other ways we can help.

http://ninjatrader.com/support/helpGuides/nt8/en-us/?oncalculateminmax.htm