weird block sizes?

Discussion in 'Trading' started by prc117f, Jun 2, 2008.

  1. prc117f


    I am looking at the tape and I notice sometimes you will see things like

    30.82 5000
    30.82 5000
    30.82 5000
    30.83 5000

    why not just 1 trade at 20000?

    and whats with the weird trades that have odd counts, like

    30.72 10147

  2. i can't say for sure, but could be bots doing arbs and also basket purchases.
  3. prc117f


    I read that now there is some kind of darknet where some of the bigger firms trade with each other on a different type of network so that the transactions do not show up on the regular tape. I am not sure if that is true or not..

    So bots are those quantitive trading programs right?