The S&P 500's seemingly unstoppable rally has put some investors on edge, but Dennis Gartman's mantra is simple when it comes to U.S. stocks: the trend is your friend.
"It's still a bull market. Sometimes one has to take a simplistic perspective and look at the charts and ask what direction is it moving in? How would a four year old look at this?" Gartman, founder and editor of the closely-watched The Gartman Letter, told CNBC on Monday.
"A four-year-old would look at the chart and say I'm not sure what it is, but it's moving from the lower left to the upper right. We try to look too deeply into things, sometimes it's better to look at what the major trend is. As we make new highs, the trend is still to the upside in equities," he said.
U.S. stocks scaled fresh heights last week, with the S&P rising to a record high of 2,096.99 on Friday as a bounce in oil prices boosted energy shares.
It's been six years into the bull market, and investors are naturally concerned about how long the good times will roll. Dollar strength and weak global economy have been cited as potential stumbling blocks by market bears in recent months. Regardless, bulls have remained in the driver's seat.