How to overcome the warning message "The signature of the file is corrupt or invalid"
Overview:
This article describes how to overcome the warning message which you might receive when you download the Trader Workstation or IB Gateway installation packages.
Background:
Since a Microsoft update has modified the signature validation mechanisms, the Trader Workstation and IB Gateway installation packages might be reported as having an invalid or corrupt signature, although their signature is indeed intact and absolutely valid.
If you are using Microsoft Edge as browser please follow all the steps below. If you are using any other browser start directly from point 3.
1. As soon as the installation package has been completely downloaded, you will notice on the bar at the bottom of your browser frame the warning message "The signature of the file tws-... is corrupt or invalid". Please click on the button View Downloads to open the DOWNLOADS panel. .png){kind=small}
2. Right click on the filename and select Run anyway.
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3. Once the installer has been launched, the SmartScreen filter will display an additional warning message. Click on the link More Info.
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4. Now click the button Run Anyway to allow the file execution. The installation will then start.
How to install Java on a Linux computer
Overview:
This article will walk you through the process of installing the official Oracle Java platform on your Linux machine.
Background:
There are many Linux distributions available and many of them come with one or more Java platform/s pre-installed. In the vast majority of the cases the Java platform which comes pre-installed on a Linux machine is not the official Oracle Java, but another one such as OpenJKD or IBM Java.
The Trader Workstation has been developed on the official Oracle Java platform and shows the most stable behavior and the best performances when run by the official Oracle Java process. Therefore we recommend to all the Linux users, who want to run the Trader Workstation, to install the official Oracle Java platform and set it as the preferred Java environment to be used by the operating system.
For the purpose of this guide, we will divide the Linux distributions nowadays available into three big families:
- APT based Linux distributions (Ubuntu, Mint) - those distributions use the Advanced Packaging Tool to fetch and install software packages in a semi-automatic way, resolving and taking care of dependencies.
- RPM based Linux distributions (Suse, OpenSUSE, Red Hat, CentOS, Fedora, Oracle Linux) - those distributions allow the installation of software packages (.rpm files), which contain the binary files to be installed on the system and an integrated dependency checker script. The .rpm packages allow a simplified and smooth installation of software without requiring a deep knowledge of the system.
- Other Linux distributions - those distributions may or may not use a specific package manager but all of them allow the installation of software using the source code package (.tar.gz) through a series of command to be issued on the Terminal.
How to install the official Oracle Java on APT based Linux distributions
The most simple way to install Java on Ubuntu or Mint is using the webupd8 repository. This method will install the latest version of JDK 8 and the JRE 8 browser plugin. The supported versions are: Ubuntu 15.04, 14.10, 14.04, 12.04 - Linux Mint 17.1, 17, 13
For details, please refer to: http://www.webupd8.org/2012/09/install-oracle-java-8-in-ubuntu-via-ppa.html
a. On your Linux machine, open the "Terminal". If you need help with accessing and using the Terminal, please refer to: https://help.ubuntu.com/community/UsingTheTerminal
b. Become root, by typing su on the Terminal and entering the super user password. Instead of becoming root, you can choose to use the sudo feature (which gives your user the root privileges for a single command). If you want to use sudo, just add sudo before each one of the commands you will enter in the Terminal. You will be requested to enter the sudo password.
c. Add the webupd8 repository by tiping add-apt-repository ppa:webupd8team/java Follow the instructions on the screen. You should be asked to press [ENTER] to continue. Once done, the repository will be added.
d. Type the command apt-get update
e. Enter the command: apt-get install oracle-java8-installer The process will download and install automatically the required packages along with their dependencies. Once the command has completed, the Oracle Java platform will be ready to be used.
Should you prefer to have control of all the phases of the installation, instead of relying on the APT facility, please refer to the instructions on this page: http://www.wikihow.com/Install-Oracle-Java-JRE-on-Ubuntu-Linux
How to install the official Oracle Java on RPM based Linux distributions
a. On your Linux machine, open the "Terminal". If you need help with accessing and using the Terminal, please refer to: https://help.ubuntu.com/community/UsingTheTerminal
b. Become root, by typing su on the Terminal and entering the super user password. Instead of becoming root, you can choose to use the sudo feature (which gives your user the root privileges for single commands). If you want to use sudo, just add sudo before each one of the commands you will enter in the Terminal. You will be requested to enter the sudo password.
c. Create the folder /usr/java by issuing the command mkdir /usr/java. If the directory already exists you will see a message indicating that. In this case you can proceed directly to point d.
d. Go to the page https://www.java.com/en/download/linux_manual.jsp
e. If you have a 32 bit system, download the file "Linux RPM" . If you have a 64 bit system, download the file "Linux64 RPM". In either case, please instruct your browser to save the file in the folder /usr/java or move the file to that foder once it has been downloaded.
f. Go back to the Terminal and move to the /usr/java folder by typing cd /usr/java
g. List the content of the folder by typing the command ls -la You should see the file you downloaded. It will be called jre-XuYY-linux-ARCH.rpm (where X is the Java family, YY the update number and ARCH will be i586 for 32 bit installer and x64 for 64 bit installer)
h. Launch this command to perform the installation: rpm -ivh jre-XuYY-linux-ARCH.rpm Obviously you need to use the real file name, for example jre-8u65-linux-x64.rpm
Once the installation has been performed, the Oracle Java should be ready to be used. Usually a system restart is not required on Linux machines. In case you see warning or error message/s during the installation, please check their content and search the Internet for possible solutions. Most of the time the warning/error messages maight refer to missing dependencies (this means that another package needs to be installed before you can install Java) or to unsufficient privileges (this means that you are launching the command with a regular user instead of "root"). If you cannot find the proper course of actions to overcome the issue, please refer to the support documentation or forums for your current Linux distribution.
How to install the official Oracle Java on other Linux distributions
If your Linux distribution does not support RPM or APT package managers, the installation of Oracle Java can be performed manually in this way:
a. On your Linux machine, open the "Terminal".
b. Become root, by typing su on the Terminal and entering the super user password. Instead of becoming root, you can choose to use the sudo feature (which gives your user the root privileges for single commands). If you want to use sudo, just add sudo before each one of the commands you will enter in the Terminal. You will be then required to enter the sudo password.
c. Create the folder /usr/java by issuing the command mkdir /usr/java. If the directory already exists you will see a message indicating that. In this case you can proceed directly to point d.
d. Go to the page https://www.java.com/en/download/linux_manual.jsp
e. If you have a 32 bit system, download the file "Linux" . If you have a 64 bit system, download the file "Linux x64". In either case, please instruct your browser to save the file in the folder /usr/java or move the file to that foder once it has been downloaded.
f. Go back to the Terminal and move to the /usr/java folder by typing cd /usr/java
g. List the content of the folder by typing the command ls -la You should see the file you downloaded. It will be called jre-XuYY-linux-ARCH.tar.gz (where X is the Java family, YY the update number and ARCH will be i586 for 32 bit installer and x64 for 64 bit installer)
h. Launch this command to perform the installation: tar zxvf jre-XuYY-linux-ARCH.tar.gz Obviously you need to use the real file name, for example jre-8u65-linux-x64.tar.gz
i. Once done, enter command ls -la You will see the folder /usr/java/jre1.X.0_YY (where X is the Java family, YY the update number)
l. The Java executables are now present in the folder /usr/java/jre1.X.0_YY/bin
m. Now check which is the symbolic link used by the system to access the java executables by entering the commands:
which java - you will receive an output similar to this: /usr/bin/java From now on we will refer to this path as javasympath.
which javac - you will receive an output similar to this: /usr/bin/java From now on we will refer to this path as javacsympath.
which javaws - you will receive an output similar to this: /usr/bin/java From now on we will refer to this path as javawssympath.
Unless your are launching the java applications using the full path (for example /usr/java/jre1.X.0_YY/bin/java ...), you would need to tell your system which java executables should be used when a generic java command is issued. In order to to this, you can either update your alternatives files (if your system supports them) or the symbolic links. Here below you can see the instructions, according to your system:
- If your system uses the alternatives files:
n. Issue the following commands, paying attention to make the necessary substitutions .
update-alternatives --install javasympath java /usr/java/jre1.X.0_YY/bin/java 1
update-alternatives --install javacsympath javac /usr/java/jre1.X.0_YY/bin/javac 1
update-alternatives --install javawssympath javaws /usr/java/jre1.X.0_YY/bin/javaws 1
- If your system does not use the alternatives files:
n. Issue the following commands, paying attention to make the necessary substitutions .
ln -sf /usr/java/jre1.X.0_YY/bin/java javasympath
ln -sf /usr/java/jre1.X.0_YY/bin/javac javacsympath
ln -sf /usr/java/jre1.X.0_YY/bin/javaws javawssympath
Market Data Non-Professional Questionnaire
Overview:
Insight into completing the new Non-Professional Questionnaire.
Background:
The NYSE and most US exchanges require vendors to positively confirm the market data status of each customer before allowing them to receive market data. Going forward, the Non-Professional Questionnaire will be used to identify and positively confirm the market data status of all customer subscribers. As per exchange requirements, without positively identifying customers as non-professional, the default market data status will be professional. The process will protect and maintain the correct market data status for all new subscribers. For a short guide on non-professional definitions, please see https://ibkr.info/article/2369.
Each question on the questionnaire must be answered in order to have a non-professional designation. As exchanges require positive confirmations of proof for non-professional designations, an incomplete or unclear Non-Professional Questionnaire will result in a Professional designation until the status can be confirmed.
If the status should change, please contact the helpdesk.
Explanation of questions:
1) Commercial & Business purposes
a) Do you receive financial information (including news or price data concerning securities, commodities and other financial instruments) for your business or any other commercial entity?
Explanation: Are you receiving and using the market data for use on behalf of a company or other organization aside from using the data on this account for personal use?
b) Are you conducting trading of any securities, commodities or forex for the benefit of a corporation, partnership, professional trust, professional investment club or other entity?
Explanation: Are you trading for yourself only or are you trading on behalf of an organization (Ltd, LLC, GmbH, Co., LLP, Corp.)?
c) Have you entered into any agreement to (a) share the profit of your trading activities or (b) receive compensation for your trading activities?
Explanation: Are you being compensated to trade or are you sharing profits from your trading activities with a third party entity or individual?
d) Are you receiving office space, and equipment or other benefits in exchange for your trading or work as a financial consultant to any person, firm or business entity?
Explanation: Are you being compensated in any way for your trading activity by a third party, not necessarily by being paid in currency.
2) Act in a capacity
a) Are you currently acting in any capacity as an investment adviser or broker dealer?
Explanation: Are you being compensated to manage third party assets or compensated to advise others on how to manage their assets?
b) Are you engaged as an asset manager for securities, commodities or forex?
Explanation: Are you being compensated to manage securities, commodities, or forex?
c) Are you currently using this financial information in a business capacity or for managing your employer’s or company’s assets?
Explanation: Are you using data at all for a commercial purposes specifically to manage your employer and/or company assets?
d) Are you using the capital of any other individual or entity in the conduct of your trading?
Explanation: Are there assets of any other entity in your account other than your own?
3) Distribute, republish or provide data to any other party
a) Are you distributing, redistributing, publishing, making available or otherwise providing any financial information from the service to any third party in any manner?
Explanation: Are you sending any data you receive from us to another party in any way, shape, or form?
4) Qualified professional securities / futures trader
a) Are you currently registered or qualified as a professional securities trader with any security agency, or with any commodities or futures contract market or investment adviser with any national or state exchange, regulatory authority, professional association or recognized professional body? i, ii
YES☐ NO☐
i) Examples of Regulatory bodies include, but are not limited to,
- US Securities and Exchange Commission (SEC)
- US Commodities Futures Trading Commission (CFTC)
- UK Financial Service Authority (FSA)
- Japanese Financial Service Agency (JFSA)
ii) Examples of Self-Regulatory Organization (SROs) include, but are not limited to:
- US NYSE
- US FINRA
- Swiss VQF
How to Transfer the TWS Layout Settings via USB or Network Drive
Overview:
The TWS layout settings can be saved on a USB or Network Drive, in order to import them from the same or from a different computer / TWS session. This article outlines the needed steps.
Please click one of the links below, according to your scenario:
B. I want to save my TWS settings on a USB or Network Drive and import them to a session with a different user
A. I want to save my TWS settings on a USB or Network Drive and import them to a session with the same user
1. Log in the Trader Workstation with the user whose layout settings you would like to export.
2. Click the top menu File > Layout Settings > Save Settings As...
3. Expand the Look In drop-down and select where you want to save the file (e.g. USB or Network Drive). Use a file name which would be easy to identify (e.g. migrate) and click Save. The file will be saved with the extension '.xml'.
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4. Proceed with the workflow, starting with step 5 in the following section.
B. I want to save my TWS settings on a USB or Network Drive and import them to a session with a different user
1. Log in the Trader Workstation with the user whose layout settings you would like to export.
2. Click the top menu File > Layout Settings > Save Decrypted Settings As...
3. Take notice of the information about the file format and click Yes.
4. Expand the Look In drop-down and select where you want to save the file (e.g. USB or Network Drive). Use a file name which would be easy to identify (e.g. migrate) and click Save. The file will be saved with the extension '.xml'.
5. Close the TWS and log in again with the user which should import the layout (that can be a different computer).
6. Connect the USB or Network Drive to the computer.
7. Click on the top menu File > Layout Settings > Layout/Settings Recovery...
8. Select Custom... and click OK
9. Expand the Look In drop-down and select the drive where you previously saved the TWS settings file (e.g. USB or Network Drive). Select the settings file (e.g. migrate.xml) and click Open.
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10. Click Open without reporting problem
11. Your TWS will automatically restart, applying the new layout settings.
Related articles
See KB3146 for instructions on overcoming the "Downloading settings from server failed" error
See KB2320 for instructions on transferring settings from one user to another
See KB2282 for instructions on how to transfer settings from one computer to another
How to Transfer TWS Settings from One User to Another
Overview:
Trader Workstation (TWS) layout settings files contains few sensitive details that are now being protected by encrypting them. Hence, you can only transfer your TWS settings from one user to another if you have a decrypted settings file from the primary user.
In this article, we will explain how to export your current TWS layout settings in decrypted format and load it on a different TWS session. You can use the same procedure to export layout settings of your Paper (Simulated) TWS and load it on your Live TWS (and vice versa).
Please follow the below steps to transfer your TWS layout settings from one user to another:
1. Log in to TWS with the user whose settings you would like to export
2. Navigate to the top menu File followed by Layout Settings > Save Decrypted Settings As...
3. Click Yes on the warning pop up
4. Open the Look In drop-down and select the folder (e.g. Desktop) where you want the decrypted settings file to be saved
5. Choose a name of your preference (e.g., migrate) and click Save. A pop-up will flash to inform you that the file has been written
6. Restart the TWS. Log in with the user which should import the layout settings
7. In the top left, click on File > Layout Settings > Layout/Settings Recovery
8. Select Custom and click OK
9. Open the Look In drop-down and select the location where you previously saved the decrypted settings file (step 5). Click Open
10. Click Open without reporting problem
11. Your TWS will automatically restart, loading the imported layout settings
References
See KB2323 for instructions on how to restore TWS settings from external storage
See KB2282 for instructions on how to transfer settings from one computer to another.
See KB3146 for instructions on how to overcome the "Download settings from server failed" error
How to transfer TWS settings from one computer to another
Overview:
This article applies to:
- Platform(s): Windows, Mac, Linux
- TWS Build(s): Build 959 and Above
Background:
The 'Store Settings on Server' feature stores the Trader Workstation (TWS) settings/configuration in the cloud and retrieve them at anytime from another computer. This allows you to transfer settings from the same user on two different machines, but not between different accounts/users.
How to upload your TWS settings to the server:
To transfer settings from one computer to another for the same username you will need to enable the option Use/store settings on server:
1. On the computer which currently has your settings, on the lower right of the login window, click on More Options >
2. Make sure the Use/store settings on server option is unchecked and login
3. Once you are logged in, enable this function:
- If you are using the Classic layout, navigate to Edit >> Global Configuration >> Lock and Exit and check the box Use store settings on server
- If you are using the Mosaic layout navigate to File >> Global Configuration >> Lock and Exit and check the box Use store settings on server
4. Select Apply and OK.
5. Click on File -> Save Settings.
6. To Exit the application navigate to File and Exit.
IMPORTANT NOTE: The above operation will only save one copy of the TWS settings on the server. The serve does not store any backup copies.
How to download your TWS settings from the server:
On any computer (on which you want to use the same settings as above): Login with the Use/store settings on server option checked on the login window. This will download the settings, which you previously saved on our server.
Related articles
See KB3146 for instructions on how to overcome the "Downloading settings from server failed" error
See KB2323 for instructions on how to restore TWS settings from external storage
See KB2320 for instructions on transferring settings from one user to another
Welcome to Interactive Brokers
Overview:
Now that your account is funded and approved you can start trading. The information below will help you getting
started as a new customer of Interactive Brokers.
- Your Money
- Configure your account to trade
- How to trade
- Trade all over the World
- Five points to enrich your IB experience
1. Your Money
Deposits & Withdrawals General Info. All transactions are administered through your secure Account Management
Deposits
First, you create a deposit notification through your Account Management > Funding > Fund Transfers > Transaction Type: “Deposit” How to create a deposit notification. The second step is to instruct your Bank to do the wire transfer with the bank details provided in your Deposit Notification.
Withdrawals
Create a withdrawal instruction via your secure Account Management > Funding > Fund Transfers > Transaction Type: "Withdrawals" How to create a withdrawal instruction
If you instruct a withdrawal over the Withdrawal limits, it will be considered an exceptional withdrawal and we will therefore need to match bank account holder and IB account. If destination bank account has been used for a deposit, withdrawal will be processed; otherwise, you must contact customer service and provide the documents needed.
Troubleshooting
Deposits: My bank sent the money but I do not see it credited into my IB account. Possible reasons:
a) A fund transfer takes 1-4 business days
b) A Deposit Notification is missing. You have to create it via your Account Management and send a ticket to Customer Service
c) Amending details are missing. Your name or IB account number is missing in the transfer details. You have to contact your bank and ask for the full amending details.
d) ACH initiated by IB is limited to 100k USD in a 7 business period. If you opened a Portfolio Margin account where the initial requirement is 110k, a wire deposit might be the better deposit option to reduce wait time for your first trade. If selecting ACH a wait time of almost 2 weeks or a temporary downgrade to RegT can be possible solutions.
Withdrawals: I have requested a withdrawal but I do not see the money credited to my bank account. Possible reasons:
a) A fund transfer takes 1-4 business days
b) Rejected. Over the max it can be withdrawn. Please check your account cash balance. Note that for regulatory requirements, when the funds are deposited, there is a 3 day holding period before they can be withdrawn.
c) Your bank returned the funds. Probably because receiving bank account and remitting bank account names do not match.
2. Configure your account to trade
Difference between Cash and Margin accounts: If you have chosen the FastTrack application, by default your account type is a cash account with US stock permission. If you would like to get leverage and trade on margin, here how to upgrade to a RegT Margin account
Trading Permissions
In order to be able to trade a particular asset class in a particular country, you need to get the trading permission for it via your Account Management. Please note that trading permissions are free. You might however be asked to sign risk
disclosures required by local regulatory authorities. How to Request Trading Permissions
Market Data
If you want to have market data in real-time for a particular product/exchange, you need to subscribe to a market data package charged by the exchange. How to subscribe to Market data
The Market data assistant will help you choose the right package. Please watch this Video explaining how it works.
Customers have the option to receive delayed market data for free by clicking the Free Delayed Data button from a non-subscribed ticker row.
Advisor Accounts
Have a look at the user guide getting started as advisors. Here you see how to create additional users to your advisor account and grant them access and much more.
3. How to trade
The Trader's University is the place to go when you want to learn how to use our Platforms. Here you will find our webinars, live and recorded in 10 languages and tours and documentation about our various Trading Platforms.
Trader Workstation (TWS)
Traders who require more sophisticated trading tools can use our market maker-designed Trader Workstation (TWS), which optimizes your trading speed and efficiency with an easy-to-use spreadsheet interface, support for more than 60 order types, task-specific trading tools for all trading styles, and real-time account balance and activity monitoring. Try the two models
TWS Mosaic: for intuitive usability, easy trading access, order management, watchlist, charts all in one window or
TWS Classic: the Advanced Order Management for traders who need more advanced tools and algos.
General Description and Information / Quick start guide / Usersguide
Interactive Tours: TWS Basics / TWS configuration / TWS Mosaic
How to place a trade: Video Classic TWS / Video Mosaic
Trading tools: General Description and Information / Users guide
Requirements: How to install Java for Windows / How to install Java for MAC / Port 4000 and 4001 needs to be open
Login TWS / Download TWS
WebTrader
Traders who prefer a clean and simple interface can use our HTML-based WebTrader, which makes it easy to view market data, submit orders, and monitor your account and executions. Use the latest WebTrader from every browser
Quick Start Guide / WebTrader User's Guide
Introduction: Video WebTrader
How to place a Trade: Video WebTrader
Login WebTrader
MobileTrader
Our mobile solutions allow you to trade your IB account on the go. The mobileTWS for iOS and the mobileTWS for BlackBerry are custom-designed for these popular models, while the generic MobileTrader supports most other Smart phones.
General Description and Information
Order Types Order Types available and Description / Videos / Tour / Users guide
Paper Trading General Description and Information / How to get a Paper Trading Account
Once your paper account is created, you can share the market data of your real account with your paper trading account: Account Management > Manage Account > Settings > Paper trading
4. Trade all over the World
IB accounts are multi-currency accounts. Your account can hold different currencies at the same time, this allows you to trade multiple products around the world from a single account.
Base Currency
Your base currency determines the currency of translation for your statements and the currency used for determining margin requirements. Base currency is determined when you open an account. Customers may change their base currency at any time through Account Management.
We do not automatically convert currencies into your Base currency
Currency conversions must be done manually by the customer. In this video you can learn how to do a currency conversion.
In order to open a position denominated in a currency that you do not have in your account, you have two possibilities:
A) Currency conversion.
B) IB Margin Loan. (Not available for Cash Accounts)
Please see this course explaining the mechanics of a foreign transaction.
5. Five points to enrich your IB experience
1. Contract Search
Here you will find all our products, symbols and specifications.
2. IB Knowledge Base
The Knowledge Base is a repository of glossary terms, how-to articles, troubleshooting tips and guidelines designed to assist IB customers with the management of their IB accounts. Just enter in the search button what you are looking for and you will get the answer.
3. Account Management
As our trading platforms give you access to the markets, the Account Management grants you access to your IB account. Use Account Management to manage account-related tasks such as depositing or withdrawing funds, viewing your statements, modifying market data and news subscriptions, changing your trading permissions, and verifying or changing your personal information.
Log In Account Management / AM Quick Start Guide / AM Users Guide
4. Secure Login System
To provide you with the highest level of online security, Interactive Brokers has implemented a Secure Login System (SLS) through which access to your account is subject to two-factor authentication. Two-factor authentication serves to confirm your identity at the point of login using two security factors: 1) Something you know (your username and password combination); and 2) Something you have (an IB issued security device which generates a random, single-use security code). As both knowledge of your username/password and physical possession of the security device are required to login to your account, participation in the Secure Login System virtually eliminates the possibility of anyone other than you accessing your account.
How to Activate your Security Device / How to Obtain a Security Code Card / How to return Security device
In case you forgot your password or lost your security code card, please call us for immediate assistance.
5. Statements and Reports
Easy to view and customize, our statements and reports cover all aspects of your Interactive Brokers account. How to view an Activity Statement
When and how should I increase the memory allocation for TWS?
Overview:
Java Virtual Machine memory allocation
The Trader Workstation is a Java-based application. As any other Java applications, it executes within a Java virtual machine (JVM) which manages the interactions between the program and the underlying Operating System (OS).
The memory (RAM) which is allocated by the operating system to the JVM constitutes the heap space. That is the area where all the class instances and arrays needed by the application are allocated. The heap space is created when the JVM is started and it is dynamically freed-up by the Garbage Collector (GC), the Java memory manager. When the need arises, the Garbage Collector is invoked to free up the heap space by unloading Java classes and other code structures no longer used by the application.
If the heap space is undersized, the Garbage Collector may not be able reclaim memory at the needed pace or may have to be called too often, draining the processor (CPU) resources. When this happens, the application may slow down, be unresponsive or even crash completely.
To ensure a smooth TWS run, it is therefore sometimes necessary to change the memory allocation, according to the layout complexity and the needs of the application itself.
Background:
In which case I should change the TWS memory allocation?
If your TWS layout contains a considerable number of elements (Analytical/Trading Tools, Chart windows, News panels, Watchlists, Layout tabs...) and your platform is slow or poorly responsive, you may want to increase the memory allocation in order to achieve better performances. If your TWS freezes or crashes, we also recommend increasing the heap space as the first corrective action to attempt.
How much memory should I allocate to TWS?
In general we recommend to start with a conservative memory allocation and test the TWS performances with that set up. If the performances improvement is less noticeable then expected or not yet satisfactory, you can switch gradually to higher values until you find the best fit for your platform.
Please consider the following:
Considering the above, we suggest to initially reserve 1.5 GB of system RAM the TWS, as explained in the guide below.
This amount of free memory is usually available on any modern computer and should be a good fit for most of the cases. Should you still notice slowness, freezing or crashes during the TWS execution, you can raise the value to 1792.
In any case, we do not recommend to set the value above 2048 since this will produce an unnecessary overhead and may thus even decrease the overall performances of the application.
How can I change the memory allocation for the TWS?
Please follow one of the links below for the instructions, according to the Operating System and TWS release you are using
Any Operating System
B.1 Your Operating System is Windows
B.2 Your Operating System is Mac OS
A. TWS version 972 and higher
The steps below are valid for all Operating Systems
1) In the TWS, click on the top menu File (or Edit if you are using Classic TWS) and select Global Configuration...
2) On the left side menu of the Global Configuration panel, click on General
3) In the panel on the right side, in the Memory Allocation field, replace the existing value with 1536(1).png)
4) Click on Apply and then on OK
5) Shut down the TWS
6) Launch the TWS with a double click on the Desktop shortcut Trader Workstation (Should you receive an error message, please see Note 3.
B. TWS versions previous to 972
B.1 Your Operating System is Windows
1) Close TWS in case it is running
2) On your keyboard, press WIN+R (the WIN key is the key with the windows flag located on the left side of tour keyboard, between the keys CTRL and ALT)
3) Type C:\Jts\tws.vmoptions and Click OK
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4) Should the system ask you which program to use to open the file, select Notepad and click OK
5) Cut the line -Xmx768m and paste it below the line ### Keep on update
6) Change then the value of the parameter Xmx from 768 to 1536
7) Save the changes by clicking on the top menu File --> Save 
8) Close the file clicking on the X icon on the right side of the toolbar
9) Launch the TWS with a double click on the Desktop shortcut Trader Workstation (Should you receive an error message, please see Note 3.
B.2 Your Operating System is Mac OS
1) Close the TWS if it is running
2) Use the Spotlight search (the magnifier glass on the top right of your Desktop) to find the file tws.vmoptions
Normally the file is located within the Jts folder (a subfolder of your home folder)
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3) On the Spotlight results panel, click on tws.vmoptions to open it. Should the system ask you how to open this file, click Choose Application... select a text editor (TextEdit, Smultron, TextWrangler...) of your choice and click Open
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4) Locate the line -Xmx768m. Cut it and paste it below the line ### Keep on update
6) Modify the value 768 in to 1536
7) Save and close the file
8) Launch the TWS with a double click on the Desktop shortcut Trader Workstation (Should you receive an error message, please see Note 3.
Notes
1. Available system RAM
In order to check the amount of available system RAM on your computer, you can:
- on Windows: use the key combination CTRL+SHIFT+ESC to start the Task Manager, click on the tab Performance and look for the "Available" Physical Memory. This will tell you the amount of unoccupied RAM in MB (1024 MB = 1GB)
- on Mac OS: Open Finder, go to Application --> Utilities and open Terminal. In the terminal type the command:
sudo purge
and press Enter. The system may ask you to enter your Mac user password. Enter the password. Once the command has completed, type the following command:
top -l 1| grep PhysMem
The "unused" value will tell you the amount of unoccupied RAM in MB (1024M = 1GB)
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2. Limitations of 32-bit Operating Systems
Please notice that 32-bit Operating Systems can normally only address a maximum of 2 GB of RAM per process (see table below for details). Because of this OS architecture limitation, if you have a 32-bit OS, the maximum memory allocation for the TWS must not exceed 2048 Mb.
3. Error: "Could not create the Java Virtual Machine"
This error may be displayed upon TWS startup if you set the memory allocation to a value higher than the available RAM of your system or if you set it higher than 2048 on a 32-bit Opertaing System. To overcome the error, you would need to decrease the memory allocation to a lower value using this procedure
Information regarding high precision forex quotes
Overview:
Clients wishing to see forex (IDEALPRO) market data in a more detailed way can now control the order book display mode via the Global Configuration. In order to access this feature you must use TWS release 944.2b or higher. The display mode selection allows the order book to be viewed either as:
- Rounded prices (default): market data is rounded out to the next 0.5 pip. This is identical to the current display functionality for the IB trading platforms. This setting provides a more stable visible quote and a larger ‘top-of-book’ size since it includes the available size at multiple price levels up to the rounded price.
- Unrounded prices: market data is visible in 0.1 pip increments. This allows you to see prices in a more granular fashion, but the displayed values will change more rapidly and the sizes for the top-of-book may appear to be smaller.
It is important to understand that either display mode accesses the same IDEALPRO order book. Order submission will still be in 0.5 pip increments and orders submitted in either display mode will execute in exactly the same way. As in the past (and currently), in cases where the order book has prices at better than your order’s limit price, you will receive the full price improvement.
Instructions on how to display high precision forex quotes
In Global Configuration go to Display, choose Ticker Row and then at the bottom of the window in the Market Data section tick Show high precision quotes for Forex. Then press apply or ok to enable the new setting.
