The principles of MQL4-programs development are shown on sample of creating a simple Expert Advisor system based on the standard MACD indicator. In this Expert Advisor, we will also see examples of implementing such features as setting take profit levels with the support of trailing stop as well as the most means ensuring safe work. In our example, trading is done through opening and managing a single position MQL4 Source Codes of Expert Advisors for MetaTrader 4. Various applications to automate analysis and trading are available in the 'Expert Advisors' section. It features various applications based on different trading algorithms and provides different degrees of automation. You can find simple EAs and complex trading robots that can fully automate. Expert Advisors für den MetaTrader 4 Expert Advisor sind in der Lage, die Kurse von Finanzinstrumenten mit Hilfe spezieller Forex-Strategien zu analysieren. Testen Sie kostenlose und kostenpflichtige Expert Advisor, um Ihren Handel zu automatisieren und profitabler zu machen Expert Advisors and Indicators for MetaTrader 4 Trading robots perform market transactions automatically, while indicators allow you to better analyze quotes and predict the price behavior. With these applications, you will be able to perform deals in MetaTrader 4 in a more informed manner, while capturing more opportunities Dark Mimas is a fully automatic Expert Advisor for Scalping Trading. This Expert Advisor needs attention, in fact presents highly customizable. Dark Mimas is based on Dark Oscillator indicator, these Trades can be manage with some strategies. The expert advisor is able to get a very high-rate of winning trades. Follow us on Telegram: https://t.me/darktradingchannel Optimization experience is required to Download the robot. My tests are indicative, for best results it is necessary to st
Erstellen eines fertigen Expert Advisors. Der MQL4/MQL5 Assistent erlaubt das Erstellen eines voll funktionsfähigen EAs auf Basis der Standardbibliothekaus der Handelsplattform. Dafür wählen Sie Expert Advisor (generieren) auf der ersten Seite des MQL4/MQL5 Assistenten. Allgemeine Eigenschaften . Füllen Sie die folgenden Felder aus: Name - der Name des EAs. Der gleiche Name wird der. Das deutschsprachige Forum für Metatrader sowie Indikatoren, Expert-Advisor, Skripte, Programmierung in MQL4 und MQL5 und viele weitere Themen
The Expert Advisor is not stopped immediately as you call ExpertRemove(); just a flag to stop the EA operation is set. That is, any next event won't be processed, OnDeinit() will be called and the Expert Advisor will be unloaded and removed from the chart. Example: //+----- Every Expert Advisor, as well as every indicator works with its own timer and receives events only from it. As soon as the mql4 program stops operating, the timer is destroyed forcibly, if it was created but hasn't been disabled by the EventKillTimer() function
Deutschsprachiges Buch zur MQL4-Programmierung. Seit kurzem gibt es ein deutschsprachiges Buch zum Thema MQL4-Programmierung mit dem Titel: MetaTrader 4 Expert Advisor Programmierung: Das Arbeitsbuch für die Programmierung automatischer Handelssysteme in MQL für MetaTrader 4 (Build 765) Taschenbuch - 14. August 2015 Expert Advisor Programmierung für den MetaTrader in MQL4 Automatisierter Handel durch Expert Advisors. Profitables Trading basiert in der Regel auf einer Strategie, welche... Programmierung in MQL4. Der MetaQuotes Language Editor bietet dem Trader die Möglichkeit, so ziemlich jeden beliebigen.... Expert Advisors (MT4) Forex Tramp EA 4.0 $ 23.79. Add to cart. Added to wishlist Removed from wishlist 0. Expert Advisors (MT4) EA Mustang 3.3 $ 22.60. Add to cart. Show next. Top Offers. Forex Decimus Trading System $ 19.03. MegaStorm 10.9 - EA Pack For 14 Currency Pairs $ 29.74. Promax Gold EA - with Smart News Filter $ 14.27. Grid Technology System $ 416.49. VelociGrid EA 3.14 $ 23.79. A forex Expert Advisor (EA, Forex Trading Robots, Automated Trading Systems) is an automated trading software that automatically places, modifies and closes trades for you on your Metatrader 4 & 5 platform. To use these EAs you only have to have a trading account with a Metatrader 4 or 5 broker and a Virtual Private Server (VPS) to ensure that you. Expert Advisors (experts) are programs in the terminal that have been developed in MetaQuotes Language 4 (MQL4) and used for automation of analytical and trading processes. They allow to perform prompt technical analysis of price data and manage trading activities on basis of signals received
Export Generated Robot Templates to MQL4 and Trade them on MT4 or MT5. BONUS TIP: Incubate Many Strategies At Once Using Portfolio EA So That You Have Higher Chance of Finding Strategies That Work in Live Markets. The Portfolio module helps you create portfolios by gluing multiple trading strategies together. Portfolio Expert Advisor Can Combine 100 Strategies to a Portfolio (EA). It allows. Best Expert Advisor for mt4. 11% growth in just 8 trading days! Monthly: 39.33% growth after just 8 days. I use this ea because it has a great risk to reward ratio. $500 to $4,436 net profit with 2.52 profit factor and only $64.51 absolute drawdown. Up 14% after just 9 trading days! Make profit every day View the Best Forex EA's, reviews and proven results and select the best FX Expert Advisors for Metatrader 4 (MT4) or Metatrader 5 (MT5) trading platforms for your needs. This is our Top 30 Ranking of the Best Forex Robots, which will earn you lots of money
Hier stellen wir Ihnen kostenlose Expert Advisor vor, die unserer Meinung nach zu den besten Handelsrobotern für den Metatrader gehören. Diese Auflistung guter Expert Advisor soll Ihnen dabei helfen ein profitables Portfolio mit automatisierten Handelsstrategien aufzubauen. Auch als Anfänger können Sie diese Expert Advisor direkt im Metatrader ausprobieren Indicators, scripts and Expert Advisors are executable programs written in MQL4. They are designed for different types of tasks. Therefore there are some restrictions on the use of certain functions, depending on the type of program. The following functions are prohibited in indicators MQL5 Expert Advisors. The new platform allows testing Expert Advisors (EAs) on real ticks, while entire trading environment is reproduced as accurately as possible and ticks are synchronized across all used instruments up to milliseconds.The strategy tester is multi-threaded, which means you can use all local computer CPU cores, local network agents and MQL5 Cloud Network speeding up the. MQL4 Expert Advisor Example. Updated 01 July 2020. Learn in this complete MQL4 Expert Advisor Example article how to code a fully functioning MA Expert Advisor to help you program your trading EA. The few manuals and guides that discuss the building of an expert advisor tend to use the moving average cross (MACross) as an example Learn MQL4 code to create your own free expert advisors. To create an expert advisor from scratch, you simply need to know a few MQL4 Basics. We have just that on our MQL4 Programming Basics Page . We also include a ,free to download, template expert advisor to help you learn from seeing an actual working EA
MQL4 Expert Advisor Template & Structure. There are approximately six structural elements in any given Expert Advisor, with five being optional and only one being essential. That's right, the structure of an EA can be as simple as just knowing the one essential part, though you will eventually want to know them all Wiki for all TradingToolCrypto Products. MetaTrader 5 trading tools: Indicators, robots, risk management, signals, custom coding, CrptoBridgePro , and more. telegram robots mql4 mql metatrader mt4 expert-advisors mql5 mt5 tradingtool tradingtoolcrypto trading-tool. Updated 3 hours ago Wie man sieht produziert unser Expert Advisor hier oben, in stetiger Folge, Kaufen- und Verkaufen-Signale und wir wollen uns jetzt einmal anschauen wie man so etwas in MQL4 programmieren kann. Um das zu tun klicken Sie bitte auf dieses kleine Symbol hier oben oder drücken die F4-Taste. Das ruft dann hier den Metaeditor auf und hier klicken wir auf Datei, neue Datei, Expert Advisor aus Vorlage. Steady MT4 Expert Advisor im Test - Recovery Modus killt die gute Idee . Lernen Sie aus den Fehlern anderer - ich zeige Ihnen hier kostenlos im Test, wie der Steady MT4 das Depot trotz guter Idee zerstört . mehr lesen. 01.02.2021 13:08 - Expert Advisor im Test. Stochastic Crossover EA für 50 Dollar im Test - 2 Strategien und Recovery möglich . Trendfolgen und Crossover Strategien.
Using an Expert Advisor algorithm trading robot in Meta Trader written in the MQL4 language is one way of accessing the market via code, thus taking the emotions out of the picture and working with just the numbers and your program logic. Taking emotions out of the equation is one measure, but this does not mean robots cannot lose Creating a ready-made Expert Advisor. MQL4/MQL5 Wizard allows creating fully operational EAs based on the standard library supplied together with the trading platform. To do this, select Expert Advisor (generate) on the first page of MQL4/MQL5 Wizard. General parameters. Fill in the following fields: Name - EA name. The same name is assigned to an EA file. Here you can also change the path. MT4 Expert Advisor Template IS NOT a fully automated strategy. Although we include some automated bots to download with this template, these are only to show the potential of the code and as examples. You will need to add to the template your own entry and exit signal code in order to have it fully operational. Why Use MT4 Expert Advisor Template . Save time — save many hours of research and. https://mql4tutorial.com/?s=macdWith MQL4 for Metatrader4 we create an automated Expert Advisor that is going to do automated trading with MACD Signals - and.. Hi everyone, Because monetization of my channel was removed, I earn nothing from my videos.So I started a content sharing network of my own. kindly visit htt..
.mq4). Earlier we saw that if RefreshRates() is not executed in Expert Advisor 2, values of local copies of predefined variables will remain unchanged during the whole period of start() execution, i.e. for example during the period t 2 - t 32. If after the third tick (that comes when start() is being executed) function. It is a robotic best free expert advisor for mt4 that help the learner like you are learning from a real man in just front of you best forex ea free download. Forex expert advisor for meta trader 4. It will make you able to do the best expert advisor for mt4in real world and also teach the people how this software is still workable since years. Here you will find some of the most deeply and. Expert Advisor Datei in Ordner kopieren Um den EA einzufügen benötigen Sie die MT4-Datei, die eines der zwei Formate (.mq4 oder .ex4) aufweist: ExpertAdvisorName.mq4 ode MT4 Expert Advisor allowed to import external experts. Some EAs do not work if this is disabled. Also note, that your EA might start and work properly for some time and only later stop working if this option is disabled. Only the creator of your EA might know how this should be set for sure. Also, this might be explained in the instruction manual if you have received one with your EA. 6. Check. Mql4 Programming Tutorials and Forex Trading Training. https://learnmql4.comNOTE: All of my 2013 youtube videos and code can now be downloaded at...https://l..
Die Entwicklungsumgebung im MT4 erlaubt es Ihnen, Expert Advisors (EA) zu erstellen und zu testen. Expert Advisor sind einfache mechanische Handelssysteme, die eine vollständige Automatisierung der Analyse-, Handels- und Risikomanagement-Aktivitäten ermöglichen. Das bedeutet, dass die gesamte Routinearbeit der technischen Analyse und die Erteilung von Aufträgen an den Expert Advisor. Expert Advisor arbeiten nur solange, wie der MT4 mit den Brokersystem online verbunden ist. Schalten Sie den MetaTrader aus, können die EAs nicht mehr aktiv handeln! Deshalb kann durch den Einsatz eines VPS (Virtuelle Private Server) das komplette Handelssystem ausgelagert werden! Sie können also an Ihrem PC arbeiten, ohne dass der Expert. Defining an array, depending on Symbol(), in MQL4 MetaTrader4 [Expert Advisor] 1. MQL4 Expert Advisor isn't doing anything. 2. Expert Advisor is not opening trades. 1. Showing Macd for MQL5 Expert Advisor. 1. MetaTrader Terminal 4: debugging an expert advisor on historical data. Hot Network Questions how to deal with heteroscedasticity in least squares regression with multiple independent.
Professional MT4 Expert Advisor Builder and MT5 EA Programmer. We are a team of experienced Expert Advisor Builder for MetaTrader 4 and 5. Our adept MQL5 and MQL4 programming have helped many of our clients switch to trading automation. We have got the right MQL4 and MQL5 programmers for your needs. Our Expert Advisor coder team works with countless clients all over the globe. We can take your. FXSTABILIZIER PRO - Profitable Expert Advisor and Fully Automated MT4 & MT5 Forex Robot trades on 8 currency pairs. It is based on a Trend strategy. Main Features FxStabilizier Pro EA: Uses hard drawdown control, Includes Durable and Turbo modes, Live statistics since 2015 year. Compatible with all brokers. ⭐ Read FxStabilizier EA Review > Total Gain: 2275%+ Monthly Profit: 5%+ Drawdown: 20. Create FX Expert Advisors without programming skills. EA Generator EA Builder MT5 Documentation Contact. Generator for forex trading expert advisor systems compatible with all forex brokers offering the MetaTrader 4 ( MT4 ) trading platform View our Forex robots NEW!!! The MQL5 EA Bulder is here. You can create your MQL5 strategies and use the powerful MT5 tester and optimizer. Welcome to the. The expert advisor (with and without Z-Score optimization) is available for both MT4 and MT5 versions of the platform. Heiken Ashi Unlike with traditional Japanese candles, it is impossible to read the actual price levels (Open, High, Low and Close) on Heiken Ashi chart, but it is easier to spot trend developments and reversals
. Wir haben hier oben bereits eine erste Sell Position. Denn hier wurde die obere gestrichelte Linie überschnitten. Unser Expert Advisor funktioniert also. Und Sie haben in diesem kurzen Video gelernt, wie Sie mit MQL4 für den Metatrader einen Expert Advisor erstellen können, der in der Lage ist, die Signale für den RSI zu. Open Range Breakout Expert Advisor MT4/MT5 Einstellungen. enthaltene ORB Expert Advisor Funktionen: geeignet für alle Indices und Aktien auf Basis von CFD. DE30,US500,US30,USTEC,STOXX50,AUS200,SWISS20,UK100,JP225,HK50 etc. Forex - nur MT5. Reduzierung der Position durch Teilverkauf. feste Verlustbegrenzung einstellbar - nur MT4 The RSI Expert Advisor For MT4 is a simple algorithmic trading system for MT4 platform. It uses one technical indicator in determining the trade bias and the time of entry. As shown above, the indicator being used is the relative strength index (RSI) oscillator created by J. Welles Wilder Jr. and is popular to many traders using technical analysis. This trading system is built around the.
Search Custom Expert Advisors in your Navigator mostly left in your Metatrader Client. Right click on Expert Advisors mq4. Attach to a chart. Modify settings or press ok. Expert Advisors mq4 is avaiable on the chart. For remove Expert Advisors mq4 from Metatrader chart: select the chart where is the Expert Advisors running in Metatrader Client The Support Resistance Trader Expert Advisor for MT4 employs three complementary methods in trade management. The first method is a passive approach, that is, allowing the trade to be closed by the stop loss or take profit. The second method is an active approach, but it applies to winning trades only. If a trade gains at least 55 pips, its stop loss will be moved to breakeven first and then.
Expert Advisor Backtesting in MT4. In order to optimize your expert advisor, you can insert the expert advisor on to your chart and then right click Expert Advisors/Strategy Tester or F6. This will populate the Strategy Tester with the name of the expert Advisor, the symbol, the modeling type, and period. Alternatively, you can select the name of the EA form the Expert Advisor drop-down box. 1: e-Trailing.mq4 Expert Advisor. This is how this trailing stop EA works: it works on one chart at time. For example, if you have a trade in EURUSD, then you need to upload it into the EURUSD chart and activate it there. So if you have trades in different currencies, then you need to upload it to each chart . MT4/MT5/JForex Expert Advisor or Forex Robot is a fully automated forex trading system. automatically implement forex strategies without your involvement. Forex Indicators. MT4/MT5/JForex Indicator - a technical forex indicator that complements those already integrated into the client's terminal (MT4, MT5, JForex, etc.). Forex Software. Useful tools for. News Big Movement EA Cost $1,980.00 - Free Download. FX141 replied 2 months, 1 week ago 1 Member · 1 Reply. Expert Advisor
That's where trailing stop expert advisors come in handy. Here's the list of 8 trailing stop ea's starting with the first one #1: e-Trailing.mq4 expert advisor. How This MT4 Trailing Stop EA Works. works on one chart at a time therefore if you have trades open in different charts, you need to upload to each char However, MT4 allows running up to 100 Expert Advisors on the same trading terminal. You just need to open multiple chart windows. This allows you to run many Expert Advisors by attaching each of them to a different chart. You can have multiple charts of the same currency pair and time frame and run a robot on each of them. You can also have multiple charts of different currency pairs and time.
Expert Advisor EA Metatrader MT4 - xpMA ZigZag EA. Description: Trading Automatic Robot. The expert advisor xpMA ZigZag EA is an automated trading system calculated on the combination of a moving average indicator xpMA v2SATL and Zig Zag indicator. The trader robot xpMA ZigZag EA EA is optimized for the pair Euro EURUSD dollar and a timeframe. Expert Advisor Programming. Looking for an MT4 programmer to automate your trading strategy? Our MQL4 programmers will create Trading Robots of best quality according to your trading logic and requirements. Whether you need a simple MT4 indicator or an advanced Expert Advisor, we can create an app for MetaTrader 4 or MetaTrader 5 How to install Expert Advisors into Metatrader. 1. Open MT4 > click on File > Open data folder. 2. Here you will find a folder called MQL4, this is the new home for all your .ex4 or .mq4 files you have. 3. Open folder MQL4. Here you will find these folders: 4. Copy your EA (experts advisors) files into MQL4/Experts folder. 5. Now restart your MT4. That's it! Now you can enjoy your EA. Forex Chakra MT4 Expert Advisor review: About The Forex Chakra MT4 Expert Advisor. Chakra MT4 is a trending following EA. This EA uses a custom indicators to detect entry signal. The fixed stop loss and take profit are always set for each trade. This EA has smart money management. Users only need to determine the accepted loss for each trade, EA will calculate the lot size for each trade.
Services. We are very proud to introduce our brand-new Forex Copy Trading MT4 Expert Advisor called AutoBot by Day Finance LTD - this makes you nothing to do in front of your computer. AutoBot can help you to copy our trades right into your MT4 platform. In this way, you won't miss any of our trades and receive all the trades in real. View the Best Forex EA's, reviews and proven results and select the best FX Expert Advisors for Metatrader 4 (MT4) or Metatrader 5 (MT5) trading platforms for your needs. These are the best Forex Robots, which will earn you lots of money! Forex trading is so difficult and we will help you to be able to choose the Best Forex EA's according to your needs. A lot of forex traders spend years. Grid Expert Advisor. $ 40 / month with a 14-day free trial and a $ 1 sign-up fee. The alphaheim Grid Expert Advisor is a dual grid system that has a both long and short exposure at every grid level on a loaded chart within MetaTrader. For this reason, this EA is not FIFO compliant and would not be suitable for US clients
EATree is a powerful Expert Advisor Builder for MetaTrader 4 and MetaTrader 5. It is a windows application that runs locally on your computer. You can create complex MT4 and MT5 EAs and forex signals using a very easy to use graphical user interface. No coding, programming or MQL knowledge is required Step 3: Paste the .mq4 or .ex4 EA file into the Experts folder. Use the Ctrl + C to copy and paste the expert advisor files from their native location to the open Experts folder, then. Foxard Expert Advisors For Metatrader 4 (MT4). Foxzard Trader Expert Advisor Expert advisor for metatrader 4 which can trade signals created with the indicator builder. Subscribe $14.97 per month Subscribe $149.97 per year. Foxzard Paws Expert Advisor Foxzard Paws is the Metatrader 4 panel with advanced trading functions. Order $79.95. LOCTrailing With Partial Close Expert Advisor 10 in 1. David WilliamsCEO iExpertAdvisor, Creator of VTS. The Visual Traders Studio Expert Advisor Builder is the result of years of development, honed by consistently applying the feedback we receive from our clients in over 90 countries worldwide. VTS is a better product because our clients are active traders and they help us deliver the most useful. The MQL4 Programming Language. An Expert Advisor is a small program for auto-trading. Specifically, the term expert advisor applies to the robots used in the MetaTrader 4 (MT4) Trading Platform. EAs may contain virtually any idea or method that the trader can do manually. Expert Advisors may be simple mathematical formulas computing averages in.
Save the TDI-RT-Clone-rAlgo_v0.8.ex4 file in MQL4\Indicators folder (this is the TDI Indi file) Remember to right-click and Refresh the Expert Advisor and Indicators header in MT4 Navigator pane, so the Pivot EA and TDI Indicator could appear on the MT4 Navigator pane How To Download Expert Advisor On MT4. Downloading an expert advisor from a vendor's website and installing it on the MT4 platform is usually a quick and simple process. Even though the process may differ from one vendor to another, it normally follows the same procedure for downloading any file from the Internet. After clicking the download button and following the stipulated instructions. In this tutorial, Rimantas explains how anyone can protect MT4 Expert Advisors and Indicators with EA Licensing system (EAL) from Signal Magician. EAL will give you a custom MQL4 code to add to your EA or Indicator so you can connect it with the EAL system. You can create time-limited license keys with expiration date and also limit the amount of MT4 accounts for each license. It's like.
Wie kann ich bei MT4 einen Expert Advisor (EA) oder Indikator hinzufügen? Öffnen Sie MT4 und gehen Sie zu Datei > Datenordner öffnen > MQL4 > Expert Advirsors oder Indikatoren. Kopieren Sie dann die Datei, die Sie hinzufügen möchten. Nachdem Sie MT4 geschlossen und wieder geöffnet haben, sollte die Datei im Navigator Fenster. Expert Advisor bezeichnet die automatischen Handelssysteme für den MetaTrader 4 und MetaTrader 5. Es sind voll- oder halbautomatische Handelssysteme die in einer eigenen Sprache MQL4 bzw. MQL5 programmiert wurden. Mit dem MetaTrader 4 lassen sich Devisen und CFDs handeln. Der MetaTrader 5 ermöglicht zusätzlich auch den direkten Börsenhandel von Aktien und Futures If you want to trade with the top Expert Advisors MT4 from each month or you want to take the best Expert Advisor from each month and combine it with the Expert Advisors coming into the next month. It's all up to you how you will manage it. What you can do, as well, is to filter the strategies every month and when the new ones are coming you can just remove all these. Algorithmic trading. Je nachdem welche anderen Expert Advisors Sie bereits installiert haben, sollte der Ordner in etwa so aussehen: Anschließend muss die MT4-Plattform neugestartet werden. Das erfolgt über das Schließen sowie erneute Eröffnen. Einstellung und Aktivierung des Expert Advisors. Inputfenster mit True / False
Expert Advisors and MQL4. For retail forex traders, one of the most popular ways to automate your trading is by using MetaTrader's Expert Advisors (EAs) and a programming language called MQL4 (or MetaQuotes Language 4). It provides you with an easy to grasp, yet powerful language to write automated trading software and custom indicators MQL4 Expert Advisor - Tips from Experienced Programmers As soon as it becomes possible to test a finished piece of code or function, do it immediately. Later, when the program grows to a large size, it will be more difficult to verify that it is working correctly. Pieces of code that are often repeated are best served with separate functions. You don't have to strive to write optimal code. Free MT4, MT5 Expert Advisor Builders. Automated Forex Trading is the 'Holy Grail' of advanced Forex trading. Τhe following EA builders are offered for free / or provide a free-trial period and can be used for creating EAs on MetaTrader-4 and MetaTrader-5. MT4 builders are designed to generate customized Expert Advisors by compiling MQL4 or MQL5 code. Some of the following EA builders are web. Download MT4 - www.free-expert-advisor.com. Kostenloser Download. ermöglicht durch. Ein paar Schritte sind hierzu allerdings notwendig... Wir möchten sicherstellen, dass alle Expert Advisor so auch bei Ihnen funktionieren wie sie es sollen. Aufgrund der enormen Vielzahl an Brokern entschieden wir uns einen zu favorisieren
r/MT4_EXPERT_ADVISOR: This community is to provide discussion of using Forex robot expert advisor from metatrader to trade xauusd (gold) . Making MQL4. Step 3 - Double-click on Experts folder. Experts folder. Step 4 - Copy and Paste your ex4 file into the Experts folder (from your desktop). ex4 file for MetaTrader 4 platform. Step 5 - Go to Navigator window and Refresh your Expert Advisors folder by Right Click on Expert Advisors and Refresh (you will see your DoubleFXRobotXXXXX.
MQL4 Expert Advisor: Dynamically change lot size according to account balance Published on May 10, 2019 May 10, 2019 • 7 Likes • 0 Comment Expert Advisor for MT4. Let the Best Expert Advisor trading for you. It's Fully Automated, trading 24/5 and work with Metatrader 4 for free. If playback doesn't begin shortly, try restarting your device The Strategy Tester — Expert Advisor testing and optimization unit The MQL5.community website provides a convenient infrastructure, where MQL4/5 developers can interact with Forex traders. The website stores useful information for developers of trading systems: full documentation, a large database of research articles and a forum where you can communicate with other developers