Energy has been the best-performing S&P 500 sector in April, rising 4.7 percent. And one of Wall Street's top technical analysts says the energetic performance is set to continue.
"Now that the sector has exceeded its 2008 high, the presumption is that the breakout that's underway will continue," Sterne Agee chief market technician Carter Worth wrote in a Monday note.
Calling the trend "steady, orderly" and "hard to argue with," Worth predicts that "another 6 percent to 8 percent upside is reasonable."
And when it comes to the best way to play it, Worth looks to oil behemoth Exxon Mobil.
"What's interesting here is that the entire group represents 10.5 percent of the S&P 500, 55 names, yet three names are half the weight of the sector—Exxon, Chevron and Schlumberger," Worth said on CNBC's "Options Action" on Friday. "And Exxon has really lagged, and we think that's the opportunity."