Do some reading first on how depth of market works and what...

Do some reading first on how depth of market works and what causes an exchange to match orders. Then we can talk.

At best, if you're scenario was plausible, your buy order would have to sit at least 1c above market to match your sell. Now think about this for a sec. Why would any want to sell to themselves at a loss? what would the point?

Besides, your point suggests that brokers have influence over how the ASX matches orders, which they don't. That's why the ASX is independent of brokers and that's why CHESS exists and is run by the ASX not the brokers.

Do some reading first, then we can talk.