He pointed specifically to weakness for Facebook, which he contended could fall to $80 per share. It closed Tuesday at $86.67 after falling nearly 3 percent.
Trader David Seaburg disagreed with Nathan's outlook, contending Facebook was a "gift" below $90 per share.
"I'm really surprised that it's been punished so much," he said.
Read MoreFacebook is going to $100: Trader
Seaburg also took a particularly bearish outlook on Apple, saying it does not have another new product to send its stock higher. Apple announced this week that it broke a first-weekend sales record with the launch of its iPhone 6s line, but its shares shed 3 percent Tuesday.
Still, trader Pete Najarian, an Apple shareholder, contended that the iPhone upgrade cycle could sustain Apple into next year, when it may get another catalyst to kickstart stock growth.
Seaburg also touted shares of Google and Amazon. Google, in particular, has a reasonable valuation despite a 13 percent gain this year, he said.
Google shares ended barely positive Tuesday after the company unveiled new phones and streaming devices.
Read MoreGoogle launches new phones, streaming devices
Long AAPL, AMAT, BAC, BMY, BP, CSX, DIS, DISCA, DKS, FOXA, GE, KKR, KO, MRK, PEP, PFE, PHM he is long calls AA, ABX, BMY, DAL, EEM, FL, MPEL, PFE, SWFT, UAL, XLF, XOM, ZIOP, he is long puts DISH, FCX, X
Dan is long PYPL Oct call calendar, BA Oct put spread, INTC Oct put spread, QQQ Oct put spread, UAL Oct/Nov put spread, XLU call spread, TWTR, PG
Opinions expressed by David Seaburg are solely his own and do not reflect the views and opinions of Cowen Group, Inc
Guy Adami is long CELG, EXAS, INTC, Guy Adami's wife, Linda Snow, works at Merck.