Are there limitations on number of EAs running concurrently?

Hi. What is the most number of metatrader instances that can run on the same machine on different demo accounts? Just wondering if there's any known problems

From other forums I get the idea that your machine memory is the limit. They do put each install in a different directory (ie 1 account per directory). Of course, number of charts open and indicators will be the deciding factor.
Update Note: Each newer install will probably overwrite the prior installs icon on the desktop, and you may have to recreate the shortcut manually.

I don't think there is a set limit. I run 4 to 8 per machine. In addition to Kenz987's suggestions make sure you set your history bars and chart bars to a minimal useful number if you want to run a lot of platforms at the same time. As noted before concerning indicators, keep in mind a couple of poorly written indicators or EAs can suck up a lot of memory. Open the Windows 'task manager' and watch how much memory each terminal uses as you open them.

it is only limited to your machines capacity. I have pushed it to 15 at one time. Naturally, the more you run the slower each will get due to allocating system resources.