public static Position operator -(Position p1, Position p2)
{
Position res = new Position();
if (p1.symbol.Length != 0 && p2.symbol.Length != 0 && !p1.symbol.Equals(p2.symbol))
throw new Exception("Position symbols not the same");
res.symbol = p1.symbol.Length==0 ? p2.symbol : p1.symbol;
double pd1 = p1.qty * (p1.direction == 0 ? 1.0 : -1.0);
double pd2 = p2.qty * (p2.direction == 0 ? 1.0 : -1.0);
res.qty = pd1 - pd2;
res.direction = (res.qty < 0.0 ? 1 : 0);
res.qty = Math.Abs(res.qty);
return res;
}
///<summary>
///Compares two Position objects.
///</summary>
///<param name="otherPosition"> an other position to compare</param>
///<returns> true if this Positions is equal
///otherwise false</returns>
public bool compare(Position otherPosition)
{
return (otherPosition.symbol.Equals(this.symbol) &&
otherPosition.qty == this.qty &&
otherPosition.direction == this.direction);
}