@M.fouad 

Hey,

For your first requirement, you can enable Application Optimized Routing. In this way, the router will consider the source IP address and destination IP address (or destination port) of the packets as a whole and record the WAN port they pass through. Then, the packets with the same source IP address and destination IP address (or destination port) will be forwarded to the recorded WAN port.

For your second problem, speedtest is not accurate when you have multi-WAN connections, because it may only test the speed of one or two  connections. You can follow this link to test more accurate speed:

https://www.tp-link.com/en/support/faq/2079/

Hope it helps!

@Somnus 

thank for your replay 

is there another way except enable Application Optimized Routing , because if i enable  it -  it effect speed of multi wan i was hope to find way like static route for example or policy to use

for examble : 

use wan1 only top open spacfic website ( All Banks Website ) what we use 

and use multi wan and loadbalance for any thing else 

@M.fouad 

If you only have certain fixed devices that need to access those websites, you may try policy routing. Direct all traffic from those devices to one of the WAN connections.

But I don't think it accords to most user cases.

@Somnus 

can you explain to me how to do it exactly 

@M.fouad 

First, you need to create an IP group for those devices that will need to access the bank websites. (PS: you may need to give those devices static IP, otherwise, the policy routing won't work once the IP changes.

Next, go to Transmission-->Routing-->Policy Routing, create a new rule, select which WAN connection you want the traffic goes, and select the IP group you just created as source and IP Group_Any as Destination.