bobla,
to be more precise using information from a different site at
http://www.moneyam.com/shareprice/OEX
here are the last 2 trades
OILEX TRADES
Date / Time Epic Price Type Quantity
01/08/2014 16:30:00 OEX 10.90 O 17,095
01/08/2014 16:30:00 OEX 11.32 O 1,527,02
which are in an agreement with the provided by you information of "Bid 10.75 Ask11.00 "
irynka