1, depending on which platform you are working on and what the leverage is. Generally you can buy 0. 1 lot.

2. The price difference you refer to is earned for the platform, because the platform does not charge extra fees, and the actual exchange rate should be the selling price. If you buy more, you will receive a spread immediately, and if you buy less, you will receive a spread.

3. Yes

4. Yes

5. Look at your leverage. If you are 100 times and the dollar rises by one point, the fluctuation of your principal is 100 X your hand.