IB Bid/Ask prices

Discussion in 'Interactive Brokers' started by echo33029, Oct 3, 2001.

  1. I've recently started using IB and I've noticed that the bid/ask prices quoted in the pre-open market are different to what I get from other quote services (both L1 and L2).

    Can someone confirm where IB's prices are coming from in the pre open market.

  2. left field:) All kidding aside, I pretty much ignore IB's quotes.
  3. Htrader

    Htrader Guest

    IB premarket quotes do not show market maker bids and offers, so this might be the difference.
  4. Fohat


    IB pre-open market bid/ask prices show quotes directly from the ECNs, which can be executed against, instantly.

    Frequently IB ECN direct quotes are ahead of LevelII quotes by half a second, which have to be aggregated first and than rebroadcasted.