I have not seen that in anything I have looked at.
I have a moving average strategy in MT5 that I optimized with several pairs, it is sorta profitable, but not near as many trades as one pair.... I guess I could change it so that different stops etc for each pair... a lottt of coding for that. It takes a lot of time to optimize and backtest several pairs on same EA. MT5 has the cloud to speed things up and it still takes a long time.
I have one ea that works on three pairs, optimizes 4 entries for each and does each pair separately..... however, the take profit and stop and trailing stop are unique for each entry..... That one takes forever and uses only one indicator, the price channel...
As soon as multipair...... huge amount of time needed.
I tried in FSB pro to make an ea that would choose between three different sets of criteria...... using logical operators....... I did not have much luck..... hahaha
My 'secret' goal is to push EA Studio until I can net 3000 pips per day....