There needs to be 3 selections (legs) to place a Trixie.
It consists of 4 bets in total, including: 3 x Doubles, 1 x Treble
At least 2 selections must win to earn a return.
Example
With 3 legs selected (A, B & C), a Trixie will contain the following bets:
Bet 1: A x B (double)
Bet 2: A x C (double)
Bet 3: B x C (double)
Bet 4: A x B x C (treble)