UPDATE 1-Thinkorswim Q4 profit trails Street

* Q4 pro forma shr $0.20 vs estimate of $0.23 * Q4 net EPS $0.14 vs yr-ago $0.26

* Q4 education revenue $36.9 mln

March 4 (Reuters) - Thinkorswim Group Inc (SWIM.O), an online brokerage and provider of investor education services, posted a quarterly pro-forma profit below market estimates, hurt mainly by a 30 percent fall in education revenue.

The company, which is selling itself to TD Ameritrade Holding Corp (AMTD.O), earned $9.5 million, or 14 cents a share, for the fourth quarter, compared with $17.8 million, or 26 cents a share, a year earlier.

On a pro-forma basis, the company earned 20 cents a share.

Net revenue fell 9 percent to $85.8 million.

Analysts were looking for a profit of 23 cents a share, excluding items, on revenue of $92.6 million, according to Reuters Estimates.

The company, which competes with Interactive Brokers Group Inc (IBKR.O), TradeStation Group Inc (TRAD.O) and optionsXpress Holdings Inc (OXPS.O), said total brokerage revenue rose 18 percent to $48.9 million.

Shares of the company closed at $7.66 Tuesday on Nasdaq. They have fallen 39 percent in the past 10 months.

For the alerts, please double-click [ID:nWNAB0022] (Reporting by Anurag Kotoky in Bangalore; Editing by Himani Sarkar)