Hello im new to betfair exchange, was looking at oddsportal opening odds for BF exch. and i was wondering if anyone know what the number in brackets represent :
example: (over/under 1st half 0.5)
Opening odds:
07 jan, 03:28 1.25 (5)
Soccer » Australia » W-League » Newcastle W - Sydney W
what does the number (5) represents here?