Banter and General Comments, page-8281

Step 1:
You get a broker that does bulk brokerage and center point trading.
All the buying/selling you do in a day on a single stock are charged as single order, at the end of the day.
Let's say: you have to make minimum $150,000 worth of trades to qulify for single $60 bulk order, at the end of the day. Regardless of how many 1 or 10,000 share buts/sells you have.
Larger daily turnover you have = cheaper the brokerage you pay. If you do enough trading you can even negotiate brokerage fees (you can also do this with CBA, etc)

Step 2:
You make trading algorithm or pay for template to help you design it.
Step 3: buy quick server and get fast internet connection. Install your algorithm and set up in the garage.
Step 4. Go out to beach, surfing, lunch, work, uni, etc.
Step 5: Check if your program made you or lose money when you get home.

For all you know those 1 share trades are made by your neighbour's uni student kid's algorithm in the garage.

People who seriously day trade don't use Commsec, etc. They use Amscott and other brokers that offer daytrader friendly brokerage accounts.

Hope that helps