You dont buy a pairing, you dont buy a coin paired with another coin

You buy a Coin. End of Story.

This Coin is Worth something compared to something else

The Graph that shows you this is a pairing. It pairs your Coin against something else.

Now if that something else is something you absolutly dont want, why are you watching at that graph?

you have to watch a pairing that interests you.

If you want USD you have to watch at the Coin/USD pairing. If your exchange doesnt offer that, you have to watch at the Coin/BTC - BTC/USD pairing to get your information

Really not that hard to understand

A Coin can not be just "up" or "down" in value. That sentence means nothing.

you have to set it into comparison with something.

Do you want to exchange your Coin for USD, then your coin might me more worth than last week, because you get now more USD

Do you want to exchange your Coin for Bitcoin, then your coin might be less worth be cause you get less Bitcoin then last week

Do you want to exchange your Coin for the Pet of your best friend then its absolutely nothing worth, because your best friend says: go to hell.