add check-gateway=ping distance=1 gateway=46.10.10.1,10.201.1.1 routing-mark=newmark

i want when bandwidth of link 46.10.10.1 is full add bandwidth 10.201.1.1
problem : fix the priority 1: 46.10.10.1 and 2: 10.201.1.1 and no changed priority in any case.
like : 1: 10.201.1.1 and 2: 46.10.10.1

It sounds as if you want to change the effective default route based on load on one upstream. Why not simply use both upstreams using one of the per connection methods?

http://mum.mikrotik.com/presentations/US12/tomas.pdf

This is what you want.