u sell order at .165.what does that mean?, page-8

From the ASX web site - interesting to note that the undisclosed number always trades first.

The following rules apply to undisclosed quantities:

Undisclosed quantities are visible only to the broker that placed the order.

The quantity may be specified as undisclosed if the order consideration is at least $200,000.

SEATS displays ‘/u’ alongside an order whenever there is an undisclosed quantity.

The quantity may be partially disclosed and partially undisclosed, provided the undisclosed portion has a consideration of at least $200,000.

The undisclosed quantity always trades first.
As soon as the consideration for the undisclosed quantity falls below $200,000 the full order quantity becomes disclosed.

As for all orders, the order price is visible.