why ETH is not following BTC price
something is going on behind

anyone have some infos ?
None of the alts are following BTC in the pump, as usual. This pattern of alts was mentioned by me in April 2018 here at Bitcointalk:
19. Always keep in mind the following pattern of BTC & Alts, as seen in past years:
*1) If bitcoin goes up heavily, all alts suffer.
*2) If bitcoin goes down heavily, all alts suffer.
*3) If bitcoin goes up slowly, only low volume alts suffer.
*4) If bitcoin goes down slowly, only volume alts suffer.
*5) If bitcoin stays sideways, every kind of alt grows.
*6) If bitcoin stays sideways for a few weeks (4+), all alts grow and low-volume alts go "absolutely" crazy.
There's nothing "strange"; it has been observed many times in the past years.