NEW YORK (TheStreet) -- TheStreet's Jim Cramer answers Twitter  (TWTR - Get Report) questions today from the floor of the New York Stock Exchange, and this week's first question deals with National Oilwell Varco (NOV - Get Report) .

Cramer suggests avoiding the stock because the numbers are too high. He says the company is in one of the most perilous spots, which is big iron going into more drilling. Cramer advises keeping an eye on the rig count, which he thinks will go down severely next year. He also thinks the company's orders will go down, which means the numbers would come down and the stock would go down.

The next question asks about GoPro  (GPRO - Get Report) , and Cramer says this is a hard one to read because the company has a supply issue. But he likes the stock long term because "it's an ecosystem."

Must Watch: Cramer Answers Twitter Questions on GoPro, Apple, Salesforce.com

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Another user asks what Cramer expects from Apple  (AAPL - Get Report) on earnings. Cramer says Apple is getting cheaper as a stock and he predicts a big year for it. He adds he wants to see the Apple Watch and thinks it could surprise people.

The next question asks if Radian Group (RDN - Get Report)  can continue to rise as the economy improves. Cramer suggests investors be long Radian and go against Genworth Financial  (GNW - Get Report) , which has terrible exposure to the long-term care problem in which they sign policies but need more reserves. Cramer says Radian does not have this problem and adds the company is well run.

Finally, a user asks if Cramer sees more growth for Salesforce.com  (CRM - Get Report) in 2015. He replies that the stock has stalled, which he sees as a mistake, and thinks it could have a big year. But he does not know if people will be willing to pay up in an environment in which they stop paying up for high tech stocks with high multiples. But the stock is resting now, and Cramer says he would like to own it long term.

STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.