With U.S. stock futures trading higher this morning on Tuesday, some of the stocks that may grab investor focus today are as follows: Wall Street expects Helen of Troy Limited (NASDAQ:HELE) to report quarterly earnings at $1.59 per share on revenue of $445.86 million before the opening bell, according to data from Benzinga Pro. Helen of Troy shares gained 0.3% to $89.30 in the after-hours trading session.NEXGEL, Inc. (NASDAQ:NXGL) issued preliminary revenue guidance above estimates. The company said it sees third-quarter revenue of $2.2 million versus estimates of $2.091 million. It expects fo…