With spreadbetting the FTSE100 index the market reverts to the 'futures' market price outside of market hours (well that is my understanding, although someone else may have a more detailed/correct answer)?
Surely although the instrument may differ; CFD as opposed to spreadbet, this will not impact on price? the market price is what the marketmaker i.e. IG decides to use as the market price although I am curious to hear if that is right now.