Difference between STP and ECN testing

 

I have an EA that I test on the Strategy Testers of two live accounts of the same broker - and STP and an ECN account.

The EA works well with the STP account when using the "tick" option as well as the "open prices" option, but with the ECN account only the "tick" option works and there are NO trades happening when using the "open prices" option.

Why is that?

 

Difficult to guess. Which EA ?

Check the Journal tab for any useful messages.