Ideally, to figure out the coincidences I need the raw trading...

Ideally, to figure out the coincidences I need the raw trading data as it comes in to ASX - Date/Timestamp, Broker, parcel size, price etc.....I have no problem with post-processing this stuff - however big it may be.
That's why I asked for a suggestion.

Re Commsec: The access I have is good only to pinpoint the dates which is not good enough for an ASIC complaint.
Anyway, I looked at the charting stuff available and am happy with what my CommSec access provides.
What I could not find is the download button - please advise how to get there (from Home, Portfolio, Watchlists, Quotes and Research, .....)
FYI - I don't have IRESS. I have no problem to register for it for one month but it should be worth the money and get me what I want.