ES options data

[MT <mtzianos@xxxxxxxxx>]

Hi List,

I've just started watching realtime data for ES options from Esignal and
realised that while the trade record seems the same from both feeds, the
bid/ask ticks received from Esignal and IB are totally different from
eachother.

E.g. ES F4C1110 around 14:30

.......Esignal..IB
Close..17.00...17.00
Bid....16.25...16.25
Ask....18.75...17.25

Such big differences occur during the entire session, so it's not just
Esignal lagging.

Any ideas?

Thanks, M