SAR指标 C#算法

SAR指标是一种技术分析指标，全称为“抛物线转向指标”（Stop and Reverse）。它主要用于确定股票、期货等金融产品价格的趋势方向和反转点。SAR指标的计算方法比较复杂，但是可以使用C#编写算法来实现。

C#是一种面向对象的编程语言，它可以用于开发各种类型的应用程序，包括桌面应用程序、Web应用程序和游戏等。在C#中实现SAR指标算法需要使用数学计算和条件语句等基本编程概念。

下面是一个简单的C#算法实现SAR指标的示例：

// 计算SAR指标
public double[] CalculateSAR(double[] high, double[] low, double acceleration, double maximum)
{
    int length = high.Length;
    double[] sar = new double[length];
    double[] ep = new double[length];
    double[] af = new double[length];
    bool[] isLong = new bool[length];
    bool[] isReverse = new bool[length];

    sar[0] = low[0];
    ep[0] = high[0];
    af[0] = acceleration;
    isLong[0] = false;
    isReverse[0] = false;

    for (int i = 1; i < length; i++)
    {
        if (isLong[i - 1])
        {
            sar[i] = sar[i - 1] + af[i - 1] * (ep[i - 1] - sar[i - 1]);
            isReverse[i] = low[i] < sar[i];
            if (!isReverse[i])
            {
                if (high[i] > ep[i - 1])
                {
                    ep[i] = high[i];
                    af[i] = Math.Min(af[i - 1] + acceleration, maximum);
                }
                else
                {
                    ep[i] = ep[i - 1];
                    af[i] = af[i - 1];
                }
            }
            else
            {
                sar[i] = ep[i - 1];
                isLong[i] = false;
                sar[i] = high[i];
                ep[i] = low[i];
                af[i] = acceleration;
            }
        }
        else
        {
            sar[i] = sar[i - 1] + af[i - 1] * (ep[i - 1] - sar[i - 1]);
            isReverse[i] = high[i] > sar[i];
            if (!isReverse[i])
            {
                if (low[i] < ep[i - 1])
                {
                    ep[i] = low[i];
                    af[i] = Math.Min(af[i - 1] + acceleration, maximum);
                }
                else
                {
                    ep[i] = ep[i - 1];
                    af[i] = af[i - 1];
                }
            }
            else
            {
                sar[i] = ep[i - 1];
                isLong[i] = true;
                sar[i] = low[i];
                ep[i] = high[i];
                af[i] = acceleration;
            }
        }
    }

    return sar;
}