As per PZ99.
However, a side issue you may encounter is your broker applying ASX trading rules.
This may result in orders going manual to be "reviewed" by your broker...(some muppet has to click ok on your order after they have finished their jokes and water cooler gossip with muppet colleagues...
), orders not being accepted- rejected by "market integrity rules".
The above will occur if changing order price or volumes (order amendments) too frequently without allowing an unspecified period of time... over 10 minutes seems to bypass this, or be sure of the trade knowing that you can change it once, quickly!
I would imagine, there may be some brokers that have more relaxed rules enforcement, from the crap I see in a daily basis...
Good luck with your apparent high risk thinking...