yes if you can give more details on this complete system,it will add to our knowledge ,regarding these manipulations
This question is better addressed to the news reporter. We will just be guessing.
However, my speculation is as follows ... it may not be a fool proof system. On either side (buy or sell), someone else may jump in the middle of the trade and execute his/her order. However, these scrips will usually have only a few trades per day so the chances of that might be low. Also, this might be a cartel implying it is not only one person who holds the share, but a group of people virtually locking others out. Also, this will be in CASH segment where so many traders may not look.
Basically they are reducing the odds of someone else jumping in the middle of the trade.
The other point is ... if someone else jumps in ... what is the impact to these guys? Can they execute the order in 10-20 small lots to reduce their risk? Or maybe hit the ENTER button simultaneously on 2 side by side computers.
** If you give me 10 more minutes ... I will probably help these guys make a fool proof system ;-)