Your first trade for Tuesday, April 21

The "Fast Money" traders presented their final trades of the day.

Steve Grasso was a buyer of POT.

Pete Najarian was a buyer of UA.

Dan Nathan was a buyer of M.

Guy Adami was a buyer of FB — which reports quarterly results after the close on Wednesday.

Trader disclosure: On April 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: Pete Najarian is long AMAT, AAPL, BABA, BAC, BMY, BP, CSX, DISCA, FOXA, GE, KKR, KO, LLY, LOCO, MBLY, MRK, PEP, PFE, he is long calls AMGN, BK, DAL, EEM, F, FL, GE, GS, HZNP, KO, MAC, MYL, NEE, NTAP, OC, PBR, PFE, RAD, SYY, TEVA, TSX, UA, UAL, VZ, XLF, XOM, ZIOP. Steve Grasso is long AAPL, BAC, BTU, EVGN, MJNA, PFE, T, TWTR, GDX, his firm is long IBM, AMZN, NE, OXY, VALE, RIG, his kids own EFG, EFA, EWJ, IJR, SPY. Dan Nathan is long BBRY June call spread, IWM May put fly, LULU May puts, M May call spread, NKE call spread, QQQ May 108/ 98 put spread, SHAK, T, TWTR, WMT June call spread, XLP May Put Spread, XLY May puts, today he bought XLY May puts. Guy Adami is long CELG, EXAS, INTC, Guy Adami's wife, Linda Snow, works at Merck.