Find if two non-consecutive values are the same vba

I have one column of data with either "UP", "DOWN" or "" as values. I am trying to write code that states that for all rows, if the first cell is "UP" then check the next rows until I come to either "DOWN" or "UP", i.e. if the next row has a "" then check the next row until I come to either a "DOWN" or "UP". I am very new to VBA, and have tried various options, but seem to only be able to bring back where there are consecutive "UP"s or "DOWNS" rather than where there is an "UP", a number of rows of "" and then another "UP".

This is my code:

Range("z1:z250").Select Selection.ClearContents

For Row = 2 To 250 If Range("Y" & Row).Value = "UP" Then

For sRow = 3 To 250
    If Range("Y" & Row + 1).Value = "UP" Then
    Range("Z" & Row) = "MT-UP"
    ElseIf Range("Y" & Row + 1).Value = "" Then
    End If
Next

End If Next End Sub

I have tried to add code such as 'For Each c in Range (“Y3”:”Y250”) but this doesn't make it find the next UP, and makes it very slow. I have also tried GoTo next cell (although seem to understand this is frowned upon!) but this doesn't work either. Any help appreciated!!

If its easier I could