The concept of "more-or-less" is expressed in American Sign Language (ASL) by using signs related to the sign known as: LIMIT.
There are specific signs or ways of expressing:
MORE
OR
LESS
-- But the sign "MORE-OR-LESS" is not done by simply stringing those other signs together. No. What you do is you combine them all into one (rather complex) sign.
To do the "MORE-OR-LESS" sign you hold out the non-dominant hand, palm up. (If you are right-handed that means hold your left hand out in front of you with the palm facing up.) In this sign the palm-up non-dominant hand can be "flat" but it often has a very slight bend at the large knuckles. (A newbie might miss that little bend, so I'm pointing it out to you so you'll be aware of it.) The non-dominant hand doesn't move during this sign.
The dominant hand (the right hand for righties) is held above the non-dominant hand. The dominant hand is palm down (sort of). Actually it is a bent hand which is cocked back at the wrist and bent forward at the knuckles with the fingers being parallel to the floor.The non-dominant hand can be though of as representing the lower limit or "base level" of that which is being measured or presented. The dominant hand can be thought of as representing the upper-limit or maximum of the amount.
Then after the hands are in place, you adopt a facial expression of "well, it can vary" and you move the dominant hand up a few inches then back down a few inches (back to its original location).
This sign (MORE-OR-LESS) can be interpreted several ways in English and applied to many situations. For example, it can mean "rate" (as in a rate of flow or payment).
For example, in the concept of "annual percentage rate" we would express "rate" as a combination of the signs "YOU PAY HOW-MUCH" followed by the "MORE-OR-LESS" sign.
See: APR
Notes: