anchor.diff:                      Definition = Option { 
                           Direction = if direction = "Buy" then 1.0 else -1.0
                           Expiry = DateTime.Now
  -                        Strike = strike
  +                        Strike = float strike
                           PurchaseDate = DateTime.Now
                           Kind = if kind = "Put" then Put else Call
                           Style = European
  
positive.code:                 {
                      Definition = Cash { 
                          Direction = if direction = "Buy" then 1.0 else -1.0
                          Price = strike
                      }
                      Pricing = None
                  }
  
negative.code: 
      type LegViewModel(l:Leg) = 
          let mutable leg = l
          let mutable strike = "0.0"
          let mutable expiry = "test"
          let mutable kind = "Option"
          let mutable direction = "Buy"       
  