NEW YORK (TheStreet) -- Investors, traders and analysts know the importance of gaining Friends on Facebook (FB) - Get Report , Connections on LinkedIn (LNKD) and Followers on Twitter (TWTR) - Get Report . So how should they trade social media stocks' earnings?

Facebook reported quarterly results on Jan. 28 and shares moved sideways. LinkedIn and Twitter report quarterly results after the closing bell Thursday.

It's always difficult to evaluate these stocks as they have not been publicly traded long enough to have 200-week simple moving averages. Investors do not buy these stocks based upon fundamentals, as price-to-earnings ratios are elevated at 29.6 for Facebook, 84.8 for Linkedin and 118.4 for Twitter.

Here are the performance statistics for these social media stock and how to trade them.

Facebook ($75.63) had a gain of 43% in 2014 but is down 3.1% so far in 2015. It is 8% below the all-time intraday high of $82.17, set on Dec. 23. The stock is trading above its 200-day simple moving average at $71.94, but below its 50-day simple moving average at $78.96.


Courtesy of MetaStock Xenith

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Investors looking to buy Facebook should enter a "good 'til canceled" limit order to buy weakness to a key annual technical level at $52.74. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to a key semiannual technical level at $80.13.

LinkedIn ($232.03) had a gain of 5.9% in 2014 and is up 1% so far in 2015. It is 10% below the all-time intraday high of $257.31, set on Sept. 11, 2013. The stock is trading above its 50-day and 200-day simple moving averages at $223.46 and $197.81, respectively.


Courtesy of MetaStock Xenith

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Investors looking to buy LinkedIn should enter a "good 'til canceled" limit order to buy weakness to a key annual technical level at $189.80. Investors looking to book profits should enter a "good 'til canceled" limit order to sell strength to key monthly, quarterly and semiannual technical levels at $266.59, $294.26 and $311.16.

Twitter ($40.72) had a loss of 44% in 2014, but is up 14% so far in 2015. It is 46% below the all-time intraday high at $74.73, set on Dec. 26, 2013. The stock is trading above its 50-day simple moving average at $38.10 but below its 200-day simple moving average at $41.37.


Courtesy of MetaStock Xenith

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Investors looking to buy Twitter should enter a "good 'til canceled" limit order to buy weakness to a key annual technical level at $30.09. Investors looking to reduce holdings should enter a "good 'til canceled" limit order to sell strength to a key monthly technical level at $52.37. A key semiannual level at $39.19 should be a magnet.

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This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.