how to train multiple assets collectively

how to train all assets using while but not individually please ?
if i use while(asset(loop(........))){ } i am going to train every asset individually, and i will end up with a set of parameters for each and evry asset.
but what i really want is to get one and only one optimal set of parameters for all the assets, is that possible with Zorro trader ?

Any help please ??

Already answered. Read this thread:
https://opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=482679&page=1

life saver, thank you andrew, will give it a try

Examples here: https://manual.zorro-project.com/loop.htm