SmartQuant Discussion

public override void OnStrategyStart()
   {
      if (!Global.Contains("n"))
         Global["n"] = 100000;
   }

// I have an error with the below condition

   public override void OnBar(Bar bar)
   {
      if (Equity >= (double)Global["n"])    // The error is 'Specified cast is not valid'

    // this boolean code works fine
    string key = "n";
    if (!Global.Contains (key))
        Global[key] = true;
    bool global_n = (bool) Global[key];
    Console.WriteLine ("N is {0}", global_n);

    // but this double code fails with the 'cast not valid' runtime error
    string key = "n";
    if (!Global.Contains (key))
        Global[key] = 100000;
    double global_n = (double) Global[key];
    Console.WriteLine ("N is {0}", global_n);

    // finally, this code works fine. I guess C# uses a different
    // storage representation for 100000 if you don't tell it to store
    // it as a 'double' bit pattern
    string key = "n";
    if (!Global.Contains (key))
        Global[key] = (double) 100000;
    double global_n = (double) Global[key];
    Console.WriteLine ("N is {0}", global_n);