Mate, if you haven’t bet in the Melbourne Cup before, then don’t bet on the Trifecta. Set a small limit just for fun. Like $20 or $40.
Why not pick two of my eight horses below, put an each way bet on them, like $10 to win and $10 to run a place (1st, 2nd or 3rd and you win ).
Or if you pick a horse whose price is more than $10, then bet $5 to win and $5 to place.
Just for fun.
Good luck and happy punting.
Cheers