DTL 0.13% $7.54 data#3 limited

I've noticed on occasions that during Pre-Open there are...

  1. 7 Posts.
    I've noticed on occasions that during Pre-Open there are identical parcel of shares on "Buy" and "Sell". Is anyone able to shed light as to why traders do that? I'm still learning.

    https://hotcopper.com.au/data/attachments/3456/3456224-0016b59e2804c2332d61cb08a79d1899.jpg
 
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