Don't pass the gas station if your tank is getting low, advises a trader on the Chicago Mercantile Exchange, because gas prices are likely headed up.

"I think it could get worse before it gets better," said Scott Shelady, appearing on Fox News Channel's "Your World" on Tuesday. The crude market, he said, "is looking for things to shock it to the upside."

Inventory issues and geopolitical problems, especially in Egypt, have the market scared to the upside, pushing crude prices to $107 a barrel, Shelady said. But by August or September, they should fall back to $95 a barrel.

Forbes Columnist: ‘Who the Hell Cleared This?’

Though Egypt doesn't produce oil, it is home to the Suez Canal, and the current political crisis there has investors concerned.

"That's not going to close, but that's got folks nervous," Shelady said.

Also, lots of speculative money has entered the market recently, he noted.

"I think, ultimately, we're going to be climbing a mountain, run out of oxygen, and we'll come back off," he said. "Right now, the nerves are to the upside. You can see those gas prices spike 20, 40, 60 cents."

On Tuesday, crude oil for September delivery rose 29 cents to close at $107.23 a barrel on the New York futures market.

Forbes Columnist: ‘Who the Hell Cleared This?’