Thank you, Marco.
I did a new install of Debian Jessie in a test partition, no updates at all. Wine version 1.6.2, well an ancient version. MT5 just asked me for my login, server and password. I upgrade it and still the same ugly results. So, MT5 is barely dead.
Stuart, I m not offended at all about your advice. But see, I m using the last Debian stable version, it is a standart to the other Linux's distros like Ubuntu, Mint and so on. Now, if you release a software for Linux that doesn't work in Debian... well, don't dare to say your software works for Linux. Just.. don't say anything and remove the charming pinguim from the webpage :)
Ive got it running like clockwork on Knoppix 7.4 Live so it must be you doing something wrong.
It's a security issue, if you do not know how to handle those, don't blame the penguin or MT5.
MT4 & MT5 LINUX WINE PROXY ISSUE WORKAROUND SOLUTION
If you have any issue installing Metatrader on Linux via WIne because the installator asks for proxy settings, here is how I managed to get MT installed on my Linux pc:
1. Find whether you run a 32 or 64 bits Linux.
2. Find a WIndows native computer of the same 32/64 bit architecture (maybe a friend, your child, your wife, yourself etc).
3. Install Metatrader on this Windows computer (of course, do not perform any customisation yet).
4. Copy the entire Metatrader directory (and all subdirectories) that sits under the Program Files directory onto the usb key.
5. Paste this directory into the Program Files (x86) directory located into the home/???/.wine/drive_c/ directory of your Linux pc.
6. Double-clic the terminal.exe (or terminal64.exe) located in Metatrader directory to start Metatrader. It should work normally.
A. You can then perform all customisations, settings, etc and they will be saved under this same directory
B. Additionally, you can install the Wine Launch Creator to create a launching shortcut on your desktop.
C. The only known issue is that some tabs like Code Base still does not access internet (I just tap onto the MT4/5 website and download directly).
That's it !
What Panthere suggested will work, although there is a way to fix the issue.
Just get the latest winetricks and install winhtt, like this.
as root user do
apt-get install winetricks
then switch to the user you want to install MetaTrader.
and create a folder, user is your user!
mkdir -p /home/user/.cache/winetricks/win2ksp4
Then download and copy the W2KSP4_EN.EXE file in the folder above.
Download links can are available at the URL below.
Finally run the command below, run it as the user not root.
Then test the MT4 installer again.
You need to install winhttp library to support downloading files from HTTPS sites. If you're using winetricks, install by: