For forward and real testing i think it depends on idea and user. Anyway it may be good to have this option in the EA's setiing as true or false. So the users may choose to use it or not.

But I think that many EAs are ok except some EAs with EMA cross and some others.

It should optional.

I know that some EAs (with MA crossing for example) are keeping the orders opened during the many days. So if we implement this idea we will have many sell and buy orders opened in one chart. It should be optional because not everybody will want to use it. As I know some version of Firebird EA is working like this: during the one or two weeks we may get 1,000 pips in profit and for an other one week 1,000 pips losses.