TD Ameritrade (NASDAQ:AMTD) has reached a new company milestone. The discount stockbroker reported its operating metrics for February, revealing that its monthly average trading figure reached an all-time high at roughly 501,000. This was also the first time that that figure came in above the 500,000 mark. In the same month one year ago, that number stood at around 386,000. 

Other line items saw notable increases, including total client assets ($612 billion in February, up from $503 billion in February 2013), and average fee-based balances ($132 billion, and $111 billion, respectively).

On a month-over-month basis, some of those numbers were less impressive. Average fee-based balances actually fell across that span of time, from January's $133 billion, while average spread-based balances remained level at $92 billion.