Sentiment on Apple stock has been positive and appears likely to send shares into three-digit territory, OptionMonster's Pete Najarian said Monday.

"The indications we're getting in the options market right now is people are expecting this to be strong," he said. "I expect this to be strong. I expect the stock to be back over $100."

Apple is expected to release quarterly earnings after the market close, just over a month after the company unveiled its well-received iPhone 6 and iPhone 6 Plus.

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On CNBC's "Halftime Report," Joe Terranova of Virtus Investment Partners also sounded bullish on Apple stock.

"All about the next quarter," he said. "That's what I'm focused on."

Terranova, who owns the stock, said there was little to sway his positive outlook.

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"I don't imagine there's very much that's going to come out of the Apple earnings tonight that's going to make me want to sell my position," he said. "Maybe add, but not sell."

UBS tech analyst Steve Milunovich said research in the last two weeks of the quarter showed that Apple had sold roughly one iPhone 6 Plus for every 2.5 iPhone 6 sold. That's twice the sales rate of the iPhone 6 Plus, which have a higher profit margin, he added.

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Milunovich, who holds a "buy" rating on the stock and a $115 price target, said that he expected a positive move for the stock on Apple's earnings results.

"I think everybody's looking for a bit of a victory lap here," he added.