According to my analysis on NIO stock, there is a pattern that we all can see. 3 top peaks from 11Jan.-9Feb., 11Mar.-26Apr. That may tell as that NIO has a potential to follow a downtrend for a while. I believe that NIO eventually go to lower states in the near future(next week may follow this downtrend as you can see in chart). But 3 peaks will shine again after this downtrend.
My prediction on this stock is positive for long-term holding, and buying on dip always have postive action on your wallet.