The price is now entering an area with a significant lack of price support, and we could easily see the price move down very quickly to below $17, and perhaps to as low as $16.00. There's significant support at $15.76 so a bottom-fishing play could be an option, but now that we're trending downward I would not be holding onto that position for too long.
Why was APH the weakest name today?
Today Scythian Biosciences closed the sale of its Latin American and Carribean Assets to APH in an all stock transaction - 48,849,218 shares of APH . Clarus Securities acted as the financial advisor in this deal. (source: https://finance.yahoo.com/news/scythian-... ).
Clarus sold a single transaction of 500,000 shares today, I'm speculating that Clarus is cashing in some of those shares on the open market for cash on behalf of SCYB. There could be further selling pressure ahead if they intend to cash out more shares on the open market.
Resistances are 18.24 and 18.53, support all the way down at 15.76