$BTC/USD looks like hit the YPP and 0.5% retraction

I don't trade BTC, I hodl it but the other day I was trying to explain myself the issues behind this sudden sell off. Well technically looks like we hit YR2 which led to bouncing back to this year PP(8591) and 0.5% fibo retraction of 8476.26. From this point we could observe bounce up to R3 levels of YPP and even 1.61% from fibo retraction which is around 13 000 .