The "Fast Money" traders gave their final thoughts of the day.

Dan Nathan said to keep an eye on Facebook, Amazon, Netflix and Google. Nathan said if those stocks stabilize tomorrow morning, "it's safe to get back in the pool."

Brian Kelly said to watch emerging market currencies.

Karen Finerman said she would be watching Foot Locker to see if the athlete-leisure trend continues.

Guy Adami said to watch Hewlett-Packard, and said not to fade the stock.

Trader disclosure: On Aug 20, 2015, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Fast Money" traders: Dan is long QQQ sept put, JOY sept calls, TWTR, PG, BA sept put spread, COST aug put spread, TJX aug put, MSFT aug / nov put spread, GOOGL Sept put spread, XRT sept put spread. Today he sold to close SLB puts. Brian Kelly is long BBRY, BTC=; ITB, TAN, TSL, the VIX, TWTR call spread, Euro; he is short AUDJPY, GBPJPY, CAC40, Ruble, Yuan. Karen is long BABA, BAC, C, FINL, FL, GOOG, GOOGL, JPM, KORS, M, SUNE calls, BABA puts, she is short SPY, Her firm is long ANTM, AAPL, BAC, C, DIS, FBT, FINL, FL, GOOG, GOOGL, GPS, IBB, JPM, KORS, M, SUNE, URI, XBI, KORS call spreads, M call spreads, SUNE call spreads, GAP puts, KORS puts, SUNE puts, her firm is short IWM, SPY, MDY, Karen Finerman is on the board of GrafTech International. Guy Adami is long CELG, EXAS, INTC, Guy Adami's wife works at Merck.