DAX Index Measure

I've been trying to write a measure to give me an index; I've got it working but could do with some help also If anyone would like to suggest aa better method please do.

my initial attempt was ;

TableDate CountofRows :=
                                                                          CALCULATE (
                                                                                     COUNT ( 'Calendar'[Date] ),
                                                                                          FILTER ( ALL ( Table1[Date] ), Table1[Date] <= MAX ( Table1[Date] ) )
                                                                                              )

Using ALL(Table1[Date], but this gave the number 1 for each 'row', but by using

ALL( Table  )

, it works fine, I have uploaded the work book showing both examples.


Richard