Having $100 in your account won’t get you far. While technically there’s no minimum, many brokers require at least $1,000 to open an account. In the U.S., if you plan to day trade stocks regularly, the PDT rule kicks in, meaning you’ll need a minimum of $25,000 to avoid restrictions.
If possible, we recommend starting with a small amount you’re fully prepared to lose. Ideally between $1,000 and $2,000—just enough for practice.