How To use Parent Proxy

RouterOS Beginner Basics
1

I have mikrotik server which take INTERNET from a proxy server
I understand that parent proxy is used for this so I try it
But I failed

Is there is another way or any article or Example about parent proxy ??

2

Parent proxy is not obligatory.
Clients can be forwarded to the proxy without other proxies.

If you need proxy on MikroTik router and want to passtrough clients over the proxy, then parent-proxy configuration is required.