There needs to be at least 6 selections (legs) to place a 5 Fold.
It consists of individual bets between 5 of the selections for all possible combinations.
At least 5 selections must win to earn a return.
Example
If there are 6 legs selected (A, B, C, D, E & G):
Bet 1: A x B x C x D x E
Bet 2: A x B x C x D x G
Bet 3: B x C x D x E x G
Bet 4: A x B x D x E x G
Bet 5: A x B x C x E x G
Bet 6: A x C x D x E x G