The gap is shown on by the green shaded box.
On Bitfinex and Binance it bounced around $7675, which uncoincidentally was the gap low on . BUT this level has not yet been reached on .
In other words, many traders placed long orders around $7675, but it seems they didn't adequately compensate for the price differences between exchanges and the . A small gap still remains, and so does the incentive for to push the price back down.