American Express, Twitter And Other Fast Money Picks For April 21

On CNBC's Fast Money Final Trade, Pete Najarian revealed that he is a buyer of Teck Resources Ltd (USA) TCK. He is going to use options to make a bullish bet.

Steve Grasso recommended a long position in Twitter Inc TWTR ahead of earnings.

Brian Kelly said that the agricultural space is on fire. He wants to buy Mosaic Co MOS.

Dan Nathan is a seller of American Express Company AXP.