Tutorial 161 | Using the Global Dictionary to transfer data from chart to chart and to RadarScreen

Tutorial161 2

Tutorial 161 demonstrates the use of the Global Dictionary. In this tutorial the values of four moving averages from one chart are stored in a GlobalDictionary using a sender program (_Tutorial161-Send) and then they are read by a receiver program (_Tutorial161-Receive).

In the first example the values are initially stored in a vector, in the other they are stored in a comma delimited list. The values are read from the Global Dictionary using another program (_Tutorial161-Receive) and plotted on the receiving chart.

The syntax for creating a global dictionary varies depending on how the global dictionary will be used. To share values within same window type (e.g. between two charts) when compatibility mode (i.e. not using multi-core) is switched on, this syntax may be used:

myGD = GlobalDictionary.create( );

To share values beyond the same window type (e.g. between a chart and RadarScreen) OR between two charts when multi-core charting is enabled.

myGD = GlobalDictionary.create( True, "share_name" );

The Share parameter value of TRUE or FALSE controls whether inter-process sharing is enabled or disabled.

FIRST EXAMPLE – COMPATIBILITY MODE. SHARING BETWEEN CHARTS

In the first example the global dictionary is created using the

myGD = GlobalDictionary.create( );

syntax. TradeStation is being used in compatibility mode (i.e. multi-core charting is NOT enabled.)

Compatibility mode is set by clicking File-Preferences-TradeStation Desktop… then selecting the Performance tab and clicking the Compatibility option

For each bar on the sending chart, the four values of the averages are stored in a vector and the vector is added to the dictionary using NumToStr( ( Date + Time / 10000 ), 4 ) as the key.

When using NumToStr( ( Date + Time / 10000 ), 4 ) as the key. Date is a standard EasyLanguage keyword formatted like 1201007.00 (i.e. the first three digits are the number of years after the year 1900, the second two digits represent the month and the last two the day of the month.

Time is formatted like 1550, i.e the first two digits are the hour in 24 hours format, and the second two digits are the minutes.

Combining the values using ( Date + Time / 10000 ) results in 1201007.1550 which is then converted to a string saved to 4 decimal places.

On the receiving chart, for each bar the program (_Tutorial161-Receive) checks to see if there is anything stored for the current bar using the key: NumToStr( ( D + T / 10000 ), 4 ). If that key exists the associated value is copied into a vector. The values for the averages are read form the vector and plotted on another chart.

SECOND EXAMPLE – MULTI-CORE CHARTING IS ENABLED. SHARING BETWEEN CHARTS AND A DIFFERENT WINDOW TYPE

In the second example the global dictionary is created using the

myGD = GlobalDictionary.create( True, "share_name" );

syntax. TradeStation is being used with multi-core charting enabled.

1. USING A VECTOR

As in the first example, the values are stored in a vector.

Storing a vector (or dictionary) as the “value” in a GlobalDictionary key/value pair will work provided the vector or dictionary values are not objects other than DateTime or dictionaries or vectors that satisfy the same restriction to any level. Values must be “serializable” to string format.

2. USING A COMMA DELIMITED LIST

For each bar on the sending chart, the four values of the averages are stored in a comma delimited list and the resulting string is added to the dictionary using NumToStr( ( Date + Time / 10000 ), 4 ) as the key.

On the receiving chart, for each bar the program (_Tutorial161-Receive) checks to see if there is anything stored for the current bar using the key: NumToStr( ( D + T / 10000 ), 4 ). If that key exists the associated value is copied into a TokenList. The values for the averages are read form the TokenList and plotted on another chart or read by RadarScreen.

Radarscreen using local time. Since this tutorial uses strings made up of date and time, the charts are set to local time when sharing data with RadarScreen.

For the tutorial to successfully share data between charts there must be bars on both the sending and receiving charts that share the same NumToStr( ( D + T / 10000 ), 4 ) values.

Programming issues discussed in the tutorial:

  • Use of Global Dictionary
  • Compatibility mode
  • Storing vectors, strings and integers in the global dictionary
  • Issues surrounding sharing across different types of window (e.g. chart and RadarScreen)
  • Using TokenLists
  • Reloading the receiving chart when data has been loaded on the sending chart

Tutorial video

Download the tutorial 161 tutorial programs (_Tutorial161-Send and _Tutorial161-Receive)

If you want to save yourself some typing the tutorial 161 programs are available for immediate download.

The tutorial programs are available for immediate download for $19.95 by clicking the following button. You can pay using PayPal or credit card. The program works with TradeStation 9.5, and TradeStation 10 but is not compatible with MultiCharts.

The program is unprotected, in other words, you will be able to see the program code.

THE TRADING APPS, INDICATORS, SHOW ME STUDIES, STRATEGIES AND OTHER PROGRAMS HAVE BEEN INCLUDED SOLELY FOR EDUCATIONAL PURPOSES.

TO THE BEST OF MARKPLEX CORPORATION’S KNOWLEDGE, ALL OF THE INFORMATION ON THIS PAGE IS CORRECT, AND IT IS PROVIDED IN THE HOPE THAT IT WILL BE USEFUL. HOWEVER, MARKPLEX CORPORATION ASSUMES NO LIABILITY FOR ANY DAMAGES, DIRECT OR OTHERWISE, RESULTING FROM THE USE OF THIS INFORMATION AND/OR PROGRAM(S) DESCRIBED, AND NO WARRANTY IS MADE REGARDING ITS ACCURACY OR COMPLETENESS. USE OF THIS INFORMATION AND/OR PROGRAMS DESCRIBED IS AT YOUR OWN RISK.

ANY EASYLANGUAGE OR POWERLANGUAGE TRADING STRATEGIES, TRADING APPS, SIGNALS, STUDIES, INDICATORS, SHOWME STUDIES, PAINTBAR STUDIES, PROBABILITYMAP STUDIES, ACTIVITYBAR STUDIES, FUNCTIONS (AND PARTS THEREOF) AND ASSOCIATED TECHNIQUES REFERRED TO, INCLUDED IN OR ATTACHED TO THIS TUTORIAL OR PROGRAM DESCRIPTION ARE EXAMPLES ONLY, AND HAVE BEEN INCLUDED SOLELY FOR EDUCATIONAL PURPOSES. MARKPLEX CORPORATION. DOES NOT RECOMMEND THAT YOU USE ANY SUCH TRADING STRATEGIES, SIGNALS, STUDIES, INDICATORS, SHOWME STUDIES, PAINTBAR STUDIES, PROBABILITYMAP STUDIES, ACTIVITYBAR STUDIES, FUNCTIONS (OR ANY PARTS THEREOF) OR TECHNIQUES. THE USE OF ANY SUCH TRADING STRATEGIES, SIGNALS, STUDIES, INDICATORS, SHOWME STUDIES, PAINTBAR STUDIES, PROBABILITYMAP STUDIES, ACTIVITYBAR STUDIES, FUNCTIONS AND TECHNIQUES DOES NOT GUARANTEE THAT YOU WILL MAKE PROFITS, INCREASE PROFITS, OR MINIMIZE LOSSES.

Disclaimer The information, materials, products and services on this Web site are made available subject to the following terms and conditions. Markplex Corporation reserves the right to change these terms and conditions at its sole discretion. This Web site and any downloads, videos, tutorials, programs and information contained herein is presented solely for educational, informational, and/or entertainment use and under no circumstances should be used for actual trading. We at Markplex Corporation are not Broker/Dealers, Financial Advisers or Registered Analysts. No offer or solicitation to buy or sell securities, securities derivatives, futures products or off-exchange foreign currency (forex) transactions of any kind, or any type of trading or investment advice, recommendation or strategy, is made, given or in any manner endorsed by Markplex Corporation. You are fully responsible for any investment or trading decisions you make. Futures and options trading has a large potential risk. You must be aware of the risks and be willing to accept them in order to invest in the futures and options markets. This Web site is neither a solicitation nor an offer to buy and/or sell futures or options. No representation is being made that any account will or is likely to achieve profits or losses similar to those discussed on this Web site. Past performance, whether actual or indicated by historical tests of strategies, is no guarantee of future performance or success. No warranties of profitability are being made or given. There is a possibility that you may sustain a loss equal to or greater than your entire investment regardless of which asset class you trade (equities, options futures or forex); therefore, you should not invest or risk money that you cannot afford to lose. CFTC RULE 4.41 - Hypothetical or simulated performance results have certain inherent limitations. Unlike an actual performance record, simulated results do not represent actual trading. Also, since the trades have not actually been executed, the results may have under- or over-compensated for the impact, if any, of certain market factors, such as lack of liquidity. Simulated trading programs in general are also subject to the fact that they are designed with the benefit of hindsight. No representation is being made that any account will or is likely to achieve profits or losses similar to those shown. Screen shots on this site are examples and are not meant to imply that any of the programs or tutorials available on this Web site will generate profitable trades. EasyLanguage or PowerLanguage trading strategies, signals, studies, indicators, showme studies, paintbar studies, probabilitymap studies, activitybar studies, functions (and parts thereof) and associated techniques referred to, included in or attached to this tutorial or program description are examples only, and have been included solely for educational, informational, and entertainment use. Markplex Corporation does not recommend that you use any such trading strategies, signals, studies, indicators, showme studies, paintbar studies, probabilitymap studies, activitybar studies, functions (or any parts thereof) or techniques. The use of any such trading strategies, signals, studies, indicators, showme studies, paintbar studies, probabilitymap studies, activitybar studies, functions and techniques does not guarantee that you will make profits, increase profits, or minimize losses. Markplex Corporation assumes no liability for any damages, direct or otherwise, resulting from the use of this information and/or program(s) described, and no warranty is made regarding its accuracy or completeness. Use of this Web site including the information, tutorials and/or programs included on it is at your own risk. You shall indemnify and hold Markplex Corporation harmless from any and all liability, loss, trading losses, costs, damage, or expense, including attorneys' fees you or third party may suffer (other than damage to your tangible property or injuries to employees occurring during the course of work) as a result of claims, demands, costs, or judgments arising out of third party and any other claims based on Markplex Corporation's performance, including, but not limited to losses resulting from the use of Markplex Corporation developed software, programs, web sites, tutorials, or the TradeStation charting and/or trading platform. Any testimonials on this Web site may not be representative of the experience of other clients and are not indicative of future results or success.
This Web site contains or may contain references and links to other companies and/or their Web sites, none of which is under the control of Markplex Corporation. Markplex Corporation makes no representations, warranties or endorsements whatsoever about any other Web sites to which you may have access through the Markplex Corporation Web site, or any products or services of those other companies, even if the products or services of those other companies or their Web sites are described or offered on the Markplex Corporation Web site or integrated with Markplex Corporation's products or services. TradeStation®, EasyLanguage® and PowerEditor® are registered trademarks of TradeStation Technologies, Inc. Other brand and product names which appear on this site are the trademarks or service marks of their respective owners, including: Microsoft® is a registered trademark in the United States Microsoft®Excel® is a registered trademark of Microsoft® Neither TradeStation Technologies nor any of its affiliates has reviewed, certified, endorsed, approved, disapproved or recommended, and neither does or will review, certify, endorse, approve, disapprove or recommend, any product or service that offers training, education or consulting regarding the use of EasyLanguage.

By continuing to use and navigate our sites, services, applications, tools or messaging, you are agreeing to our Terms and Conditions and the use of cookies, web beacons and similar technologies as described in our Privacy Policy and Privacy Policy on the use of cookies.

Cookie settings

Below you can choose which kind of cookies you allow on this website. Click on the "Save cookie settings" button to apply your choice.

FunctionalOur website uses functional cookies. These cookies are necessary to let our website work.

AnalyticalOur website uses analytical cookies to make it possible to analyze our website and optimize for the purpose of a.o. the usability.

Social mediaOur website places social media cookies to show you 3rd party content like YouTube and FaceBook. These cookies may track your personal data.

AdvertisingOur website places advertising cookies to show you 3rd party advertisements based on your interests. These cookies may track your personal data.

OtherOur website places 3rd party cookies from other 3rd party services which aren't Analytical, Social media or Advertising.