It depends on your goal

- If you want "live practice" $100 would be sufficient, don't burn cash when you aren't profitable yet
- If you want to make $500 per month, evaluate your trading system first, how much does your
  trading system generates? If your system can make 100% consistently a year, you'll need $6,000 capital.
  If it's 20% consistently per year, you'll need $30,000.

Find your GOAL first, then depending on what your goal is, form a system that are able to achieve those goals. Most people do system hopping because they don't understand what they want, they just want quick and easy and just to earn money, You want a stable 20% return a year system? or you want a system that can give you 20% every month.

Form a system that fit your goals, back-test and get 5 years of data to make sure it's profitable
only then you determine your deposit amount.

FBS minimum as low as 1$ .