An Old Melbourne Cup System was (from memory)

Qualifiers must be placed 1st, 2nd or 3rd in the Caulfield Cup or in the MV Cup (If winner of MV cup gets a penalty then ignore this horse and take the 4th placed horse). Further qualifiers from finishing 1st, 2nd or 3rd in MacKinnon Stakes or SAAB (is it still called this as it seems to change every other year?).

Ignore any 3yo or aged horses.

This will give you a list of horses to consider. Obviously it will eliminate most overseas horses as they do not start before the MC.

Another piece of information worth considering is ignore any horses listed at >$21 as I believe the last was Tawriffic in 1989 (30/1).

Good luck to all that try to back the winner!