Success Story: thinkorswim, Inc.

Company Profile

On-Line Retail and Institutional Brokerage firm offering a wide range of trading services and access in the Equities, Options, Futures, Forex, Funds. On June 11th, 2009, TD AMERITRADE Holding Corporation (NASDAQ: AMTD) acquired thinkorswim Group Inc.


We were looking for a Web Application Load Testing tool to increase visibility into scalability of the system. The main challenges were finding a tool which would be easy to set up and run, and one which would make it easy to maintain the testing scripts and behaviors.

Application tested: We develop highly available advanced AJAX, DOM driven web sites. We are testing the website in general as well as the trading component of our platform.

Protocols tested:

HTTP/HTTPS, AJAX, Webservices, Flex and our own custom services.


We chose NeoLoad as the winner based on its reasonable price/capability ratio, as well as relative ease of setup.

Our load testing campaign is relatively small < 2500 simulated users, but we will be growing this to test 50k or more in the next year or so.

Test Results and Added Value

NeoLoad’s primary value to our business is in the improved visibility into the performance characteristics of our server-side development. We also benefit in the ease of use, which makes it approachable even by staff who are not primarily in the QA/Engineering disciplines.