anyone know if

Now I'm trying to avoid an obsession.

I've search the WEB in an attempt to discover if it is possible for traders to use software......to control of their buy/sell orders to insert fake orders?

But that implies it has to be possible (and for that matter, legal) for someone to place buy/sell orders that are guaranteed to not be executed...using software control?

This would explain my observations of how the "Depth of trades" changes.

I've looked at Aussie Stock Forums to no avail.

http://www.aussie-stock-forums.com/forums/index.php?
(HotCopper says this link is profane. Delete the dashes to restore the link)

For example.

If someone places a large buy order to give the impression (to the market) that there are big buyers with big interest in that stock, when in fact the order is fake, then it would be very helpful if there was a way to be sure the fake order was not filled.

So are there software systems available to do it?