I run MT4 Expert Advisors on dedicated VPS or Virtual Private Server with targeted 100% uptime. VPS are available for an affordable subscription and their 24/7 operation is a good fit for forex trading. In my VPS with 1 GB RAM, I ran up to 3 installed instances of MT4 with no trouble.
DIY VPS solution for forex traders who are into auto trading. It is basically a low-cost tablet PC connected to a home internet and both left on 24/7.