Why IBKR Lite? · Unlimited, Commission-Free Trading · No Account Minimums or Inactivity Fees · Competitive Interest Rates · A Powerful Suite of Trading Platforms. IBKR Lite is meant for retail investors, including financial advisors trading on behalf of their retail clients. IB Short Video: IBKR LITE. Features, IBKR Lite, IBKR Pro. IBKR Lite was designed to meet the needs of investors who are seeking a simple, cost-free way to trade US exchange-listed stocks and ETFs and.