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Data Sharing between multiple MT4 terminals

  • #1
  • First Post: Jan 3, 2008 9:37am Jan 3, 2008 9:37am
I need to share data between several MT4 borkers terminals, real time, while running on the same computer. Is there any other way to accomplish this besides using a DLL to write and read to a common folder?
thanks
Everything is perfect! ...Except for my perception of what perfection is!
  • #2
  • Jan 3, 2008 10:14am Jan 3, 2008 10:14am
text files..... one terminal writes, while the other loops (checking for change in size)... accomplished with 2 EAs
  • #3
  • Jan 3, 2008 12:36pm Jan 3, 2008 12:36pm
I've tried that with CSV's but each terminal application can only read and write to it's own Expert/Files/ folder. I want to share data between different metatrader applications. Is there a way to change the path structure so the EAs read/write elsewhere?
Everything is perfect! ...Except for my perception of what perfection is!
  • #4
  • Jan 3, 2008 8:30pm Jan 3, 2008 8:30pm
Quoting notomoro
I've tried that with CSV's but each terminal application can only read and write to it's own Expert/Files/ folder. I want to share data between different metatrader applications. Is there a way to change the path structure so the EAs read/write elsewhere?
Yes, use named Pipes or TCP/IP
  • #5
  • Jan 3, 2008 9:39pm Jan 3, 2008 9:39pm
A DLL is by far the easiest way to accomplish this task.

What have you got against DLLs?

There is even one already written that allows you to write files to a directory outside the MT4 files directory:
http://www.metatrader.info/node/168

Coder
  • #6
  • Jan 4, 2008 5:44am Jan 4, 2008 5:44am
Coder - Excellent! Thanks for the link. That is exactly what I need. The only thing I have against DLL is fear of the unknown.
Thanks
Everything is perfect! ...Except for my perception of what perfection is!
  • #7
  • Jan 4, 2008 9:28am Jan 4, 2008 9:28am
Is there a way to use a DLL in an EA to access the DDE info from another brokers MT terminal application and bring it into the EA as a variable? The other brokers data could be examined while running the EA.

Everything is perfect! ...Except for my perception of what perfection is!
  • #8
  • Jan 4, 2008 10:18am Jan 4, 2008 10:18am
Did you try installing the 2nd MT4 into the "experts\files" directory of the first MT4 install? (Then try to access the file down a few levels?)

Quoting notomoro
I've tried that with CSV's but each terminal application can only read and write to it's own Expert/Files/ folder. I want to share data between different metatrader applications. Is there a way to change the path structure so the EAs read/write elsewhere?
  • #9
  • Jan 4, 2008 11:08am Jan 4, 2008 11:08am
Interesting Idea. I'll try that. thanks
Everything is perfect! ...Except for my perception of what perfection is!
  • #10
  • Jan 5, 2008 8:48am Jan 5, 2008 8:48am
Quoting notomoro
Is there a way to use a DLL in an EA to access the DDE info from another brokers MT terminal application and bring it into the EA as a variable? The other brokers data could be examined while running the EA.
This can be done, but you will need a central hub acting as a dispatcher.
I would avoid DDE.. Its very Cludgy..If you did use DDE, you would prob get away with not having the hub though..Your DLL could in effect call DDE.

Instead, Id have a DLL on each side that polls the server, and gathers data from the the other EA.. In other words, Each EA on each side, has the other MT4's data. Each EA is polling the server.
BTW, this is all a EA can do, is poll.. Nothing can push to the EA, the EA must ALWAYS request using a DLL.


We do this a lot with some of our arbitrage strategies.
  • #11
  • Jan 5, 2008 11:42am Jan 5, 2008 11:42am
Ghamm...
Broker arbitrage is what I'm sophmorically trying to research. Can you recommend any good reads on this, or maybe even any existing scripts or EAs. There was a thread on broker arbitrage here a while back but it died. Either they found it not profitable or they are too busy making money to post...

thanks
Everything is perfect! ...Except for my perception of what perfection is!
  • #12
  • Edited 1:06pm Jan 5, 2008 12:00pm | Edited 1:06pm
Quoting Coder
A DLL is by far the easiest way to accomplish this task.

What have you got against DLLs?

There is even one already written that allows you to write files to a directory outside the MT4 files directory:
http://www.metatrader.info/node/168

Coder
I am getting a "Page Not Found" error on the download link on the above site. Could somebody share the downloaded zip file here? Thanks. I tried registering and still could not Login!

chandra

EDIT: eventually I was able to get it. Thanks for the useful link.
  • #13
  • Jul 4, 2011 11:06am Jul 4, 2011 11:06am
Quoting achandrasekaran99
I am getting a "Page Not Found" error on the download link on the above site. Could somebody share the downloaded zip file here? Thanks. I tried registering and still could not Login!

chandra

EDIT: eventually I was able to get it. Thanks for the useful link.
I know this is from a long time ago, but can someone post the zip file here? I tried to downloaded, but page not found. Thanks.
Wise-EA MT4 Programming
  • #14
  • Last Post: Apr 19, 2015 11:55pm Apr 19, 2015 11:55pm
I would like to use volume data of a broker at another brokers' terminal (real time on 1M chart).. I have not much experience with DLLs. I can write, modify and use EAs and indicators in MT4.

I have read various threads about data exchange between terminals. There are comments about DLLs, Pipes etc. Actually I am able to export the data I want via an EA called 'testdataexport' which I downloaded from a thread here. but I am unable at the moment the import it to MT4 to an offline chart for example.

I would appreciate any help before I start to DLL tutorials.

Thanks.
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