Did you miss "Mad Money" on CNBC? If so, here are some of Jim Cramer's top takeaways.

What the heck happened to the stock of BioTelemetry (BEAT) - Get Report , which fell more than 20% earlier this month in a brutal three-day sell off? Cramer did a little homework to find out.

Cramer explained that BioTelemetry makes remote heart monitoring systems and has had a tough go since the financial crisis, with the stock bottoming out in early 2016 just above $9 a share. Since then however, the company had seemingly righted the ship, seeing shares nearly double in 2016 and rise another 40% this year before the mid-September nosedive.

At issue was a negative analyst report that slapped a sell rating on the stock, saying the company was losing market share to rivals. For a small stock that's not widely covered, Cramer said, this one downgrade was enough to get the short sellers piling onto BioTelemetry. But then the bulls stepped in, reiterating the bull case for the company, complete with a $50 price target.

Cramer said he's siding with the bulls on BioTelemetry, as they've been covering the company for a lot longer than the bearish newcomer that tends to cater to short sellers.

Over on Real Money, Cramer says that when the stock of Facebook (FB) - Get Report gets crushed like it did today, he's more attracted to it than when it's soaring. Get his insights with a free trial subscription to Real Money.

Cramer and the AAP team say the decline in technology stocks is providing some buying opportunities. Find out what they're telling their investment club members about Facebook, Nvidia (NVDA) - Get Report and Activision Blizzard (ATVI) - Get Report and get in on the conversation with a free trial subscription to Action Alerts PLUS.

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