Looks like the shorts ran out of shorts to cover around the 28th-29th March. Shorting started in earnest from around 54c in Oct '22, maxing out around the New Year @ 32c then covering down to 22c finishing March 29.
A slight bump in SP on March 30 and April 1 for a total of around 600k shares ($150k) does look anomalous but it's small bananas on the scale of things and could simply be related to the shorting cover confirmation known within the trading (broker) sector.
Accumulation ? - particularly after the last reported trade of the day on the ASX (today) was
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