Historically when FB reaches this vortex negative level, the stock drops an average of 6.71%. FB is currently in a bearish pennant and due to break out up or down. Based on historics, the pennant, and potential support levels, it looks like a drop to 108.23 is highly likely over the next few weeks.
I am slightly skeptical of the pennant break within the next few trading days, but those believing Trump will reduce capital gains tax rates may conduct massive profit taking for calendar year 2017 while there is profit to be had in order to reap the reward come tax time in Spring of 2018. Large amounts of profit taking can become the catalyst for a near term drop in markets, or a correction which could lead to a greater than 6% drop.