Noob explanation:
Once the top graph BIP91 Lock-in hits 80% (blue bar) Segwit will lock. Right now well over 80% is hitting (the black bar).
We must go 336 blocks with 80% or more miners to get Segwit in from block 476448. Upgrade should activate around 9pm tomorrow 7/18.
I hope this helps. Its not over yet but it looks like Segwit is for sure getting in and there will only be one Bitcoin. Please everyone claim down. Crypto is still on a big discount from the crash so its still a good time to be buying. This could be last chance to buy this low. Good luck.