Getting errors trying to compile using MAX and MIN

[RaygunWizzle]

So I get the following errors when trying to compile this indicator I am trying to build. At the core of it, I just want this indicator to draw a line across the top and bottom of the prices in a specified period creating a range. Once I get the bones of this worked out I would like to refine it further, but this is the first step. Can you help me understand how to fix this?

namespace NinjaTrader.NinjaScript.Indicators
{
public class RangeDefiner : Indicator
{
private Series<double> highPrice;
private Series<double> lowPrice;
private double rangeHigh = 0.0;
private double rangeLow = 0.0;
protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"An indicator to find and define price ranges on a chart.";
Name = "RangeDefiner";
Calculate = Calculate.OnBarClose;
IsOverlay = false;
DisplayInDataBox = true;
DrawOnPricePanel = true;
DrawHorizontalGridLines = true;
DrawVerticalGridLines = true;
PaintPriceMarkers = true;
ScaleJustification = NinjaTrader.Gui.Chart.ScaleJustification.Right;
//Disable this property if your indicator requires custom values that cumulate with each new market data event.
//See Help Guide for additional information.
IsSuspendedWhileInactive = true;
RangePeriod = 10;
AddPlot(Brushes.Green, "RangeHigh");
AddPlot(Brushes.Red, "RangeLow");
}
else if (State == State.DataLoaded)
{
// Initialize the high and low price data series
highPrice = new Series<double>(this, MaximumBarsLookBack.Infinite);
lowPrice = new Series<double>(this, MaximumBarsLookBack.Infinite);
}
}

protected override void OnBarUpdate()
{

// Get the highest and lowest prices for the specified period
double rangeHigh = MAX(RangePeriod)[0];
double rangeLow = MIN(RangePeriod)[0];

// RangeHigh = rangeHigh;
// RangeLow = rangeLow;

}

region Properties

[NinjaScriptProperty]
[Range(0, double.MaxValue)]
[Display(Name="RangePeriod", Order=0, GroupName="Parameters")]
public double RangePeriod
{ get; set; }

[Browsable(false)]
[XmlIgnore]
public Series<double> RangeHigh
{
get { return Values[0]; }
}

[Browsable(false)]
[XmlIgnore]
public Series<double> RangeLow
{
get { return Values[1]; }
}
#endregion

}
}

[NinjaTrader_Emily]

Hello RaygunWIzzle,

Thank you for your post.

MAX and MIN both take an int value for the period, though it looks like RangePeriod that you are using from the input is a double:

[NinjaScriptProperty]
[Range(0, double.MaxValue)]
[Display(Name="RangePeriod", Order=0, GroupName="Parameters")]
public double RangePeriod
{ get; set; }

If you plan to use RangePeriod as the period value in the MAX and MIN indicator methods, you will need to change it to be of type int rather than double. This should resolve the error.

Please let us know if we may be of further assistance.