How to Know When to Buy Apple Stock - and When to Sell (Nasdaq: AAPL)

Apple stock (Nasdaq: AAPL) is up more than 66% over the past year and more than 15% just in 2015.

Yet the arrival of the Apple Watch today (Monday) has forced analysts to recalibrate their AAPL price targets.

You see, the Apple Watch is the Cupertino, Calif., company's first foray into a new product category since the iPad in 2010. All the revenue it generates will be additive.

And it could generate a ton of revenue. The cheapest model starts at $349 and a mid-range version starts at $549. But the Edition model, with its 18-karat solid gold case, starts at $10,000, with one variation going for a whopping $17,000.

That means it looks like a good time to buy AAPL stock - but how can investors know for sure? And that begs a question just as important: How do you know when to sell a high-flyer like Apple?

To learn how to maximize your gains in Apple stock, watch the video below.

The Power to Move Gold Prices: Despite the fat price tag, Apple is said to be building millions of the high-end gold version of the Watch. And when you add up the gold they'll be using with those impressive projections, you get a product that will actually change the dynamics of the gold market. Here's why the Apple Watch will be the biggest gold catalyst of 2015...