That's the story :
On July 10 2014 I asked my broker to buy for me shears SPCB At Nasdaq, I asked to pay not more then 9.4$ limit price .
My account got 2000 shears and & charged 18,800$ +broker commission 60$.
Looking at Nasdaq report for this day I found out the the deal was on 9.22 $ and not 9.4. $