Price and Chart HIO, page-1591

I'd like to clarify one of my points above and ask a question of others.

In my post above I said:

1. Despite the price increases, there is an increasing number of buyers. A few weeks ago, the number of buy orders were often in the 200's. In recent days it has increased to be in the 300's. When I have looked today, it has sometimes been over 400. To me, that says that the shares are being bought up by new buyers coming in, rather than existing buyers increasing their bid.

The market depth appears to have dropped all buy orders below 20 cents. Not sure if its just my platform (Nabtrade) or across the board. Is this an ASX rule to ensure buys and sells are not too far from the current price?

For reference and comparison, the buy orders showing to me are 269 for 6.3M shares. The trend in these numbers and the same for the sell may be relevant for those looking for a retrace and entry top up.