BIP 91 is projected to lock in during this difficulty period

At time of this post, 230 out of 336 blocks in the current period (68% of them) are signaling for BIP 91 and 54 blocks remain in the period.

The threshold is 80%, so that means 39 more blocks are needed. There are 54 blocks remaining in the period, meaning if 72% of the rest of the blocks signal BIP 91, it will lock in.

An explainer: http://www.coindesk.com/coindesk-explainer-bitcoin-bip-91-im...