StockSharp/StockSharp · error · ArgumentOutOfRangeException

LocalizedStrings.InvalidValue

Error message

LocalizedStrings.InvalidValue

What it means

LaguerreRSI.Gamma is the smoothing factor in John Ehlers' Laguerre RSI and must lie strictly inside the open interval (0, 1). Gamma == 0 freezes the filter and Gamma == 1 makes it unstable, so the setter throws ArgumentOutOfRangeException with LocalizedStrings.InvalidValue for value <= 0 or value >= 1. The [Range(0.000001, 0.999999)] attribute mirrors this in UI editors.

Source

Thrown at Algo.Indicators/LaguerreRSI.cs:45

	private decimal _gamma;

	/// <summary>
	/// Gamma parameter.
	/// </summary>
	[Display(
		ResourceType = typeof(LocalizedStrings),
		Name = LocalizedStrings.GammaKey,
		Description = LocalizedStrings.GammaDescriptionKey,
		GroupName = LocalizedStrings.GeneralKey)]
	[Range(0.000001, 0.999999)]
	public decimal Gamma
	{
		get => _gamma;
		set
		{
			if (value <= 0 || value >= 1)
				throw new ArgumentOutOfRangeException(nameof(value), value, LocalizedStrings.InvalidValue);

			if (value == Gamma)
				return;

			_gamma = value;
			Reset();
		}
	}

	/// <inheritdoc />
	protected override IIndicatorValue OnProcess(IIndicatorValue input)
	{
		var price = input.ToDecimal(Source);

		var gamma = Gamma;
		var gamma1 = 1 - gamma;

		var l0 = (1 - gamma) * price + gamma * _l0;

View on GitHub (pinned to 601a191de6)

Solutions

  1. Set Gamma strictly between 0 and 1 (typical 0.5m–0.7m; default 0.5).
  2. Clamp into the open interval: `lr.Gamma = Math.Clamp(g, 0.000001m, 0.999999m)`.
  3. Map percentage input correctly: `lr.Gamma = pct / 100m` and reject endpoints.

Example fix

// before
lr.Gamma = 1m;
// after
lr.Gamma = 0.7m;
Defensive patterns

Strategy: validation

Validate before calling

static decimal SanitizeGamma(decimal g) => Math.Clamp(g, 0.000001m, 0.999999m);
// usage: lr.Gamma = SanitizeGamma(raw);

Type guard

static bool IsValidGamma(decimal g) => g > 0 && g < 1;

Try / catch

try { lr.Gamma = raw; }
catch (ArgumentOutOfRangeException) { lr.Gamma = 0.5m; }

Prevention

When it happens

Trigger: Setting Gamma to exactly 0, exactly 1, or outside the range, e.g. `lr.Gamma = 0`, `lr.Gamma = 1m`, or `lr.Gamma = 1.5m`.

Common situations: Slider/spinner that allows the inclusive endpoints 0 or 1, percentage-style input (0–100) mistakenly fed directly as Gamma, or a deserialized value of 1.

Related errors

AI-assisted analysis of StockSharp/StockSharp@601a191de6 (2026-08-13). Data as JSON: /api/errors/ac8dfaaab3ceef2c. Report an issue: GitHub.