You've just made a smart decision by choosing to download our highly acclaimed trading software. We think you'll find it has all the bells and whistles you need to carry you successfully from opening bell to closing bell every trading day. So, click INSTALL thinkDesktop to download our pride and joy. For further instructions, see below. Best of luck to you!

If you need more help and would like to speak to someone in person, give us a call at 1-866-839-1100 or email support@thinkorswim.com.

Note: If you are reinstalling the thinkDesktop application, please make sure the application is not currently running. thinkDesktop does auto-update itself with every new release, however, so reinstallation shouldn't be necessary.

Complete Installation Instructions (by operating system)

 Windows Instructions: Install thinkDesktop 64-bit (38 MB)
  Install thinkDesktop 32-bit (36 MB)
  1. Click "Install thinkDesktop" above to automatically select the installer appropriate for your operating system and click 'Run'. The download may take anywhere from a couple of minutes to half an hour depending upon the speed of your Internet connection.
  2. Note: Depending on your security settings, you may be presented with dialogs asking for permission to continue. Confirm you want to proceed with the installation.
  3. Once the download has completed the installation wizard should start automatically. Follow the instructions when prompted. Only advanced users should change any of the options from the defaults selected by the wizard.
  4. Once you have clicked Done, the installation process is completed. You will now have an icon labelled thinkorswim that displays the thinkorswim logo on your desktop. If this is visible, the installation was completed successfully.
Note: You do not need to install any other software. A Java virtual machine is included with this download. If you are updating your 32-bit installation to 64-bit, the installer will automatically detect your old installation and retain your existing settings. No manual intervention is required.

Mac OS X Instructions: Install thinkDesktop (42 MB)
  1. This installation required OS X 10.7.3 or later. To ensure you are running it, click the Apple Menu and select 'About this Mac'.
  2. Click 'Install thinkDesktop' to download the thinkorswim installer. Once downloaded open the .dmg file to start the application installation.
  3. Note: Depending on your security settings, you may be presented with dialogs asking for permission to continue. Confirm you want to proceed with the installation.
  4. Once complete, you will have an icon labelled thinkorswim that displays the thinkorswim logo on your desktop. If this is visible, the installation was completed successfully.
Note: The compressed installer should be recognized by Stuffit Expander and should automatically be expanded after downloading. If it is not expanded, you can expand it manually using StuffIt Expander 6.0 or later. If you have any problems launching the installer once it has been expanded, make sure that the compressed installer was expanded using Stuffit Expander. If you continue to have problems, please contact technical support at (866)839-1100.

 Linux Instructions: Install thinkDesktop (8 MB)
  1. Click "Install thinkdesktop" to download the thinkorswim installer to a directory on your PC.
  2. After downloading open a shell and CD to the directory where you downloaded the installer.
  3. At the prompt type: sh ./thinkorswim_installer.sh
For more thorough Ubuntu installation instructions click here.

Note: If you do not have a Java virtual machine installed, you may need to download one from Sun's Java web site or contact your OS manufacturer.

Note:For clients who intend to run the software on Linux, Solaris or other Unix variants, manual update of the software may be required on these systems and we have no official support for configuring these operating systems.


 All Other Platform Instructions: Install thinkDesktop (zip - 6 MB)
For Unix or Unix-like operating systems:
  1. For Java 2, after downloading, type java -jar launcher.jar
  2. For Java 1.1, after downloading, type jre -cp launcher.jar install
  3. If that does not work, try java -classpath [path to] classes.zip:launcher.jar install
  4. If that does not work either, on sh-like shells, try
    cd [to directory where launcher.jar is located]
    CLASSPATH=launcher.jar
    export CLASSPATH
    java install
  5. Or for csh-like shells, try
    cd [to directory where launcher.jar is located]
    setenv CLASSPATH launcher.jar
    java install
Instructions (for other platforms)
  1. Be sure you have Java 1.1.8 or later installed. You can download Java from Sun's site
  2. In a console window, change to the directory where you downloaded launcher.jar to before running the installer.
  3. Your operating system may invoke Java in a different way. To start the installer, add launcher.jar to your CLASSPATH, then start the main class of the installer named install
Note:For clients who intend to run the software on Linux, Solaris or other Unix variants, manual update of the software may be required on these systems and we have no official support for configuring these operating systems.

Mac OS X is a registered trademark of Apple Computer, Inc.
Windows is a registered trademark of Microsoft Corporation.