I agree with novafx99. I have one example:
- computer located in Russia can connect with Alpari server with no any problem during the day time only;
- computer locased in US does not have good connection with Alpari.

It is internet conection with broker's server. Mainly it is not pure connection. Internet is going through many getaways. For example alpari server may be the following: Moscow, St. Petersburg, Finland, USA, Asia and so on. And finally I am getting the signal to my Metatrader. In some cases it depends on provider. Because internet providers are selling/buying the internet to each other and to me and so on.

To solve this problem it is necessary to evaluate the situation:
- proxy and firewalls;
- try to change internet provider.
- if it is not helping so change the broker.

Many people are changing the broker because of the bad connection only.

I had the same problems with some brokers and finally I changed the brokers.
And I do not know how this problem can be solved technically by one user of Metatrader.