Now, you may think that there are few similarities between the stocks, and in some ways, that's correct. After all, Facebook is a social network, and Tesla makes electric cars. Tesla has a market cap below $20 billion, and Facebook's is above $110 billion.
But both stocks rely on momentum. And that's why the charts of each are so important.
(Read more: Facebook director Andreessen's firm sells a third of its shares)
From the long side, I would be more inclined to take a shot at Tesla. In fact, I am currently long Tesla shares as a trade, as I believe it will bounce off of what I perceive to be a near-term bottom. I am using a stop at $138 on the downside.
Meanwhile, I would look to press the recent weakness in Facebook. I would not be surprised to see it gap to the downside on some fundamental news, just as Tesla did last week.