How margin works. The margin feature on your Schwab brokerage account allows you to access your available margin cash by placing a trade or withdrawing cash. Higher balances may be eligible for lower interest rates. How much can you borrow? The amount you can borrow depends upon the type and value of securities in your account. Limit Order Trade Fee on Stocks at ... - brokerage review Limit Order Trade Fee on Stocks at Online Brokers (2020) See how much discount brokerage companies are charging in fees and commissions for limit orders:TD Ameritrade, Charles Schwab, Etrade, Merrill Edge, Fidelity Investments, Vanguard, Ally Invest, Wells Fargo, Robinhood, Interactive Brokers, Firstrade, and TradeStation.