Different Crypto correlation

does BTC-ETH movement effects ETH-USDT price, suppose if ETH_USDT goes up does BTC_ETH goes down?? if yes why, because these are two different pairs, with different order books.

Hi. Technically speaking, they are not related. However, if you observe some correlation between them, you can do some further market analysis. Probably you can get some idea to build up your trading strategy.