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Bollinger Band problem

Why am I getting this error?

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Hey Patrik, the problem was in the initialization of the BollingerBands object. The parameter k was never initialized. Below is the constructor that was being called:

/// </summary>
/// <param name="name">The name of this indicator</param>
/// <param name="period">The period of the standard deviation and moving average (middle band)</param>
/// <param name="k">The number of standard deviations specifying the distance between the middle band and upper or lower bands</param>
/// <param name="movingAverageType">The type of moving average to be used</param>
public BollingerBands(String name, int period, decimal k, MovingAverageType movingAverageType = MovingAverageType.Simple)
: base(name)
{
MovingAverageType = movingAverageType;
StandardDeviation = new StandardDeviation(name + "_StandardDeviation", period);
MiddleBand = movingAverageType.AsIndicator(name + "_MiddleBand", period);
LowerBand = MiddleBand.Minus(StandardDeviation.Times(k), name + "_LowerBand");
UpperBand = MiddleBand.Plus(StandardDeviation.Times(k), name + "_UpperBand");
}

The backtest below has k initialized to 2.0:

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The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.


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