why so many exactly the same orders on both buy and sell sides?

  1. 20 Posts.
    Here is screenshot of market depth for SVW today - as you can see, on buy and sell sides we have many symmetrical orders - all with the same volume of 170 shares.
    It is very hard to imagine that we have so many separate buyers and sellers with identical orders on both sides. More likely that somebody puts these same orders on both sides. Is this the case of market manipulation by somebody?
    https://hotcopper.com.au/data/attachments/5113/5113579-c51f6e11bfd83f0929cd0a03cb904971.jpg
 
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