Shares of Adobe Systems Inc. (ADBE) - Get Report have been on fire, rallying over 36% in 2017 and 44% over the past 12 months. With earnings due out after the close on Tuesday, investors are hoping that momentum continues.

"Let me very, very consistent on Adobe," TheStreet's Jim Cramer, manager of the Action Alerts PLUS portfolio, said from the floor of the New York Stock Exchange. He explained that the AAP portfolio began buying Adobe ahead in late-2016, enjoying most of the recent rally.

At first, investors didn't seem to like last quarter's results on the surface. But after digging into the earnings report, they found a lot of positives under the hood, Cramer reasoned.

So how should investors approach this quarter? "Keep your powder dry when it comes to Adobe," he said, meaning set aside some cash in order to buy the stock on a pullback. Cramer says there will likely be a better chance to buy Adobe than at current levels. 

If that pullback doesn't materialize, oh well. There's not much investors can do about it now after such a big run. Analysts expect Adobe to earn 95 cents per share on $1.73 billion in revenue for the most recent quarter.

Another company reporting earnings on Tuesday after the close is FedEx Corp.  (FDX) - Get Report . UPS (UPS) - Get Report just announced a surcharge for its busier times and this gives FedEx a window of opportunity to do the same thing, Cramer reasoned.

Cramer recently talked about the potential for FedEx to get into the privatization of U.S. airports and how that could set up as a win-win. There may not be any insight on the conference call about such a catalyst, but it would be a big deal nonetheless if and when the U.S. government take that step, Cramer concluded.

Analysts expect FedEx to earn $3.88 per share on $15.56 billion in revenue for the most recent quarter. Earnings expectations are up from $3.65 per share just 90 days ago.

Adobe shares rose 1.1% to $141.88 by Tuesday's close. FedEx stock fell 0.7% to $208.95.

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At the time of publication, Cramer's Action Alerts PLUS had a position in ADBE.