The intraday trading video is a bit large so I suggest downloading it while you read the rest of this article, so that you have a good understanding of what is happening.

Although I have never traded stocks this way and never traded financial markets outside Greece besides FOREX, I think I can share some comments with you. First of all and in comparison with my betfair trading's videos using Bet Angel Pro, the buying and selling columns are the same even in color! Since it's the first time I watched a day trading video, only now do I realize why betfair have picked those 2 colors to distinguish "back" and "lay" columns. They indeed wanted to create a betting exchange almost exactly as a stock exchange. On the other hand though, the orders are submitted in the opposite direction. That is the day trader buys when he places an order on the left (blue) column) and sells when clicking on the right (purple) column, whereas the betfair trader, who uses BetAngel Pro, buys (places a lay bet) on the right column and sells (places a back bet) on the left column. I know that many betfair customers consider backing as buying but that is wrong. Since we back and hope to lay at lower betting odds, we expect a price fall. Would you buy when you foresee a price fall? I don't think so.

Returning to the trading video, the prices are refreshing at real time. By real time I mean that the refresh intervals must be around 0.2 secs, which means about 5 or more refreshes per second. Comparing to the refresh rate with BetAngel, we can see that trading in betfair is exactly like trading stocks, no surprise there. Now, the difference between betfair trading and stock trading comes to the commission issue. I can't discuss it though in detail, since I can't be aware of the commission the day trader paid. In the end of the video, he shows his account details, P&%L and his trading details but we can't calculate his commission. However, from what I have studied and read all these years, commission in stock trading is applied to each trading order, whereas in Betfair commission is charged to the final P&L result of the betfair trader.

During the real time day trading video, the stock trader executes 9 buying orders and 9 selling orders, trades over 400,000 EUR, and wins 159 EUR. It is worthmentioning that his total trading capital is about 12,000 EUR. Obviously he is trading using a margin account. If you haven't heard what a margin account is, read some of the following:

Margin: Borrowing Money to Pay for Stocks

Wikipedia: Margin (Finance)

Oanda: What is Margin