-- Balance Minimums
In order to open a new account you must deposit USD 5,000 (or USD equivalent). As per US regulations, in order to trade in a margin account you must have at least USD 2,000.

Minimal commission fee USD 10/month

no mutual fund

In RBC Direct Investing, can buy:
Both Canadian and U.S. stocks
Over 2,500 mutual funds
Fixed income investments such as T-Bills, bonds and one of the largest selections of GICs online

http://www.rbcdirectinvesting.com/pdf/commission-fees-jun-2006.pdf

-Commission in US Exchange
Up to and including 1,000 shares $28.95 US
Greater than 1,000 shares:
Stock price
$0.00 – $2.00 : 1.5% of trade
$2.01 and over: $0.03 per share

A fee of $15 Cdn, charged quarterly, will be applied to your non-registered investment accounts with market balances less than $5,000.

-Mutual Fund, no fee
RBC Direct Investing charges an early redemption fee equal to 1% of the selling value (minimum $43) on all funds sold within 120 days
of purchase, with the exception of RBC Funds.
Processing fees may be charged on some funds at the time of purchase (1% to 5%). Please verify with an RBC Direct Investing investment
services representative.