Amazon
Looking at the daily chart of Amazon, it may be best to wait for a pullback. Lang says the stock looks to have stalled out after initially roaring 10% past the neckline of a so-called inverse head and shoulders formation.
Also, looking at the Moving Average Convergence/Divergence line or MACD, a momentum indicator that technicians use to detect shifts in a stock's trajectory, Lang said he's seeing a sell signal.
However, if we do get a sell-off in Amazon, Lang thinks that it will likely just be a brief pullback.
Looking at the weekly charts, Lang sees a strong floor of support around $250. And he added that the stock has a powerful uptrend line that's nowhere near being broken. With Amazon, Lang thinks the ideal move would be to wait for a pullback to $250 and then start buying.
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Netflix
Looking at the daily chart of Netflix, Lang sees what's known as a 'bullish pennant pattern', something he considers incredibly positive.
A pennant is what you get when, after a huge move higher, a stock starts to zigzag, creating a sort of triangle that looks like, well, a pennant on top of a flag-pole.
Pennants are continuation patterns and Lang believes if Netflix breaks out of this triangle, it should resume a long march higher.
Lang added that Netflix made a very similar pennant formation in November, and over the next six weeks the stock rallied about 20 points higher.
Lang also points out that the so-called Williams oscillator looks very similar to 2011, at a time when Netflix rallied up to $300.
However, it's also worth noting that Netflix just had a gigantic run, and Lang thinks it might need to trade sideways and digest that move for a bit, even though he thinks long-term the general direction for this stock is higher.
Google
On Friday Google made a new all-time high at $776, and Lang points out that we often see stocks tack on an additional 10% move after the first time they make a new historical high.
He added that although Google appears to be overbought, however it's been staying at overbought levels for an extended period of time. When that happens, Lang says typically the stock will remain overbought and continue to rally.
What's the bottom line?
If you're looking to play tech, think FANG, Bob Lang's acronym for Facebook, Amazon, Netflix, and Google. All 4 names appear to be turbocharged momentum stocks that could have a lot more room to run according to Lang's chart work.