Not closing at the high levels does not worry me. It is to be...

Not closing at the high levels does not worry me. It is to be expected that short-term traders need to sell to lock in some profit. The main thing here is that the share price is breaking through the recent high and making a new high.
Based on today's open and close prices, I expect the share price to trade lower when it opens on Monday next week.
The biggest swing will occur on Tuesday after the RBA hands its decision on the cash rate.
If the RBA holds the cash rate, then ZIP should make a new high and trade around $0.40 which is the next strong resistance level.
However, if the RBA hikes rate as widely expected then ZIP will trade lower and may go as low as $0.30 which is the next strong support position.
Overall, ZIP should go up moving forward, especially in the lead-up to the new year. Traditionally we have a market rally during the festive season.
For what it is worth, this is my opinion. Obviously, not financial advise.
I hope it helps.