Call VBA method every time Excel cell is updated

Question

I am working on a trading algorithm in Excel and VBA. A cell in the Excel document gets updated from a trader client with the time remaining. I want to call a method every time that cell changes its value. How is this done?

Answer 1

See the solution on this page:

automatically execute an Excel macro on a cell change

To trigger an event when cell A1 changes,

Private Sub Worksheet_Change(ByVal Target As Range)
    If Not Intersect(Target, Target.Worksheet.Range("A1")) Is Nothing Then Macro
End Sub