How to set a range for order qualities?

How can I set a range as opposed to a specific value for order qualities?

You can't.

But I got a tip for my 2nd country saying it would be better if I set the quality of orders to something between 120-140. I am bit confused now. If I specify 140 for example is that the minimum or maximum quality requested?

It's saying that it's better to specify a single value in that range than outside that range.

If you specify 140, it will result in a quality of 140 +/- like 5 points.

I specify 120 personally.

Ahh, got it now. Thanx Mizore ;-)

i like 163 personally but thats just us +/-3.7623765 points