[https://www.interactivebrokers.co.jp/en/trading/trading-rules.php](https://www.interactivebrokers.co.jp/en/trading/trading-rules.php)
I’m checking out the examples by IBKR here, but still cannot fully understand exactly what it means and why they need to enforce this.
Also, after the first transaction, why is the amount of Available for Trading is 1M in Example 1 while it is zero in Example 3?
Update: Thanks everyone for the answers, I got the idea behind the rules now. It looks likely that IB made a typo in their documents and made it unclear.
by PyroShoot