public DMITrendElement(Random rand)
        {
            var n = 2 * rand.Next(2) - 1;

            trend        = (Trend)n;
            SymbolString = "DMITrend == " + trend.GetString() + "?";
        }
 public override string ToString()
 {
     return("DMITrend == " + trend.GetString() + "?");
 }
 public override string ToString()
 {
     return("ParabolicTrend == " + trend.GetString() + "?");
 }