how do i do a cross above, cross below, cross over, cross under
Sorry for too much delay in my response. I wasn't doing well.
I don't really understand your question. If it is related to how to use moving averages cross overs to define Trading Systems then please have a look at Trading System help page (https://stockalyze.com/help/manual/topics/trading-systems.html).
If it is something else then please let me know.
Thanks,
Sacha