Still doesn't work, I have this so far:
=SWITCH
(
LAST(Fields!Value.Value, "DataSet1") = 0, 0,
(FIRST(Fields!Value.Value, "DataSet1") >= LAST(Fields!Expr2.Value, "DataSet1")),3,
(FIRST(Fields!Value.Value, "DataSet1") / LAST(Fields!Expr2.Value, "DataSet1")), >= 0.7, 2,
(FIRST(Fields!Value.Value, "DataSet1") / LAST(Fields!Expr2.Value, "DataSet1")) < 0.7, 1
)
The error: 'syntax error' - underlined above
What do you detect here?