There are still some diamonds to be found within the market's uncomfortably expensive rough.

It's a tough time to be putting your portfolio's idle cash to work. Most of the market's most popular stocks seem overbought, overpriced, or both.

Dig a little deeper though, and you'll find some names still worth buying. Shopify ( SHOP -0.86% ) is one of them. Although the stock's 115% advance over the course of the past 12 months makes it look and feel just as overheated as many other tickers, this one's got plenty of upside left ahead.

What's Shopify?

Even if you've never heard of it, there's a good chance you've used Shopify's technology.

Shopify helps businesses establish and operate an online store. The same can be done without such third-party tools, and using platforms like

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