I am reading this:
Failover (WAN Backup)
https://help.mikrotik.com/docs/pages/viewpage.action?pageId=26476608
There is something I don’t understand. In the section “Adding Multiple Hosts” it says:

What is this for exactly and what do I use in place of 10.10.10.1 and 10.20.20.2?
Update 1: I just finished the config as per this page with gateway values of my 2 ISPs. It does not work. The “virtual hops” without any explanations makes no sense.
This is completely different (he doesn’t use “virtual hops”) compared to “Recursive Routing + Failover - Mikrotik RouterOS v7” in
https://www.youtube.com/watch?v=eTmpBAAW_pQ
Update 2:
- Just found this page “MultiWAN with RouterOS” http://forum.mikrotik.com/t/multiwan-with-routeros/163698/1
- Will give it a read and report back