/// <summary>
 /// Initializes a new instance of the MoneyFlowIndex class
 /// </summary>
 /// <param name="name">The name of this indicator</param>
 /// <param name="period">The period of the negative and postive money flow</param>
 public MoneyFlowIndex(string name, int period)
     : base(name)
 {
     PositiveMoneyFlow = new Sum(name + "_PositiveMoneyFlow", period);
     NegativeMoneyFlow = new Sum(name + "_NegativeMoneyFlow", period);
 }