"machine order"

I saw lots of "machine order"which designed and controled by computer program in Level 2,and where can i get informations for "machine order" .
Can i trigger them out?How to do?

 

be more specific in your question

are you just talking about

11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52
11.15 200 12:01:52

or what?


pretty much 99% of what you see in LEVEL II is controlled by computer programs...

 

e.g.

Bid Ask
NYSE 6.05 5 NYSE 6.06 7
NYB 6.04 2 NYB 6.07 3
... ...
NYB 5.95 200 NYB 6.16 200
NYB 5.94 200 NYB 6.17 200
... ...


I means the Bid/Ask orders of "5.95 200"/ "6.16 200" will move quickly and aslo will disappear soon,but these orders will appear time to time in diffrent stock.They seems controled by computer program.
I want to know who use these program and where can i get informations for "machine order" .
Can i trigger them out?How to do?

 

Here is a start: http://en.wikipedia.org/wiki/Algorithmic_trading

Continue here: http://www.elitetrader.com/vb/forumdisplay.php?s=&forumid=48

 

Thanks a lot for your help,nonlinear5