In the margin accounts, you can do trade on so-called T+0. You have to use margin accounts. You should manage the size of your position, not to use the margin. If you have $25000, and you just trade 200 shares of MOS, or 300 shares of UYG, you are not using margin because you don't borrow any money from your broker. When your leverage is over 1, you have borrowed some money form your broker.
For IB magin accounts, it allows you to have a levarage of as high as 4 to do DAY-TRADING. That means, if you have $10000, you can buy almost 3500 shares of UYG now!
For IB magin accounts, it allows you to have a levarage of as high as 4 to do DAY-TRADING. That means, if you have $10000, you can buy almost 3500 shares of UYG now!