how to know what are the element's values that increase and those that decrease in a stream of lists ?

Hello,
how to know what are the element's values that increase and those that decrease in a stream of lists ?

list-streaming-what-are-values-increasing-and-decreasing

Actually how to separate and route them ?

With vexpr and a pair of zl's I get this:

yep. it's what I was looking for. nice shot johan. thx a lot.

I did it like that but it's really not better :

List streaming : what are values increasing and decreasing ?