The price of crude oil bottomed on Feb. 11, which was the middle of the window of opportunity to buy oil-services stocks Diamond Offshore (DO) - Get Report , McDermott (MDR) - Get Report , Noble Corp. (NE) - Get Report , Transocean (RIG) - Get Report and Tidewater(TDW) - Get Report at levels below their late-2008 or early-2009 lows.

Back on Feb. 8, I explained why the time was right to "catch a falling Knife," even when the knife has gone through the floor.

Crude oil has gained 39.5% since trading as low as $26.05 per barrel on Feb. 11. Diamond Offshore stock is up 52.5% since trading as low as $14.18 on Jan. 20. McDermott is up 80.5% since this "option on survival" traded as low as $2.20 on Jan. 20. Noble Corp. is up 78.2% from its low of $6.70 set on Feb. 3. Transocean has gained 48.8% since its bottom of $7.67 set on Feb. 24. Tidewater has the biggest gain of 124.3% since its low of $4.24 set on Feb. 3.

Here's the scorecard for these five oil-services stocks.

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The weekly charts are shown below: The red line through the weekly price bars is the key weekly moving average (a 5-week modified moving average). The green line is the 200-week simple moving average considered the "reversion to the mean". The study in red along the bottom of the chart is weekly momentum (a 12x3x3 weekly slow stochastic), which scales between 00.00 and 100.00, where readings above 80.00 indicates overbought and readings below 20.00 indicates oversold. A negative weekly chart shows the stock below its key weekly moving average with weekly momentum declining below 80.00 in a trend towards 20.00.

Here's the weekly chart for Diamond Offshore.


Courtesy of MetaStock Xenith

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Diamond Offshore has had a positive weekly chart since Feb. 19 with the stock above its key weekly moving average of $20.33 but well below its 200-week simple moving average of $47.74. The weekly momentum reading is projected to rise to 50.65 this week up from 53.61 on March 4.

Investors looking to buy Diamond Offshore should consider doing so on weakness to $20.54, which is a key level on technical charts until the end of this week. A lower buy level is $15.34 in play for the remainder of March. Investors looking to reduce holdings should consider doing so on strength to its March 4 high of $25.27.

Here's the weekly chart for McDermott.


Courtesy of MetaStock Xenith

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McDermott ended last week with a positive weekly chart with the stock above its key weekly moving average of $3.29. The upside is to the 200-week simple moving average of $7.26. The weekly momentum reading is projected to rise to 43.55 this week up from 27.46 on March 4.

Investors looking to buy McDermott should consider doing so on weakness to $3.21 and $2.56, which are key levels on technical charts until the end of this week and the end of March, respectively. Investors could have bought this "option on survival" at $2.39 on Feb. 10, two days after my Feb. 8 analysis.

Here's the weekly chart for Noble Corp.


Courtesy of MetaStock Xenith

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Noble ended last week with a positive weekly chart with the stock above its key weekly moving average of $9.97 with the stock well below its 200-week simple moving average of $24.67. The weekly momentum reading is projected to rise to 37.76 this week up from 24.40 on March 4.

Investors looking to buy Noble should consider doing so on weakness to $8.87 and $6.30, which are key levels on technical charts until the end of this week and the end of March, respectively. Investors looking to reduce holdings should consider doing so if the stock rises to $19.55, which is a key level on technical charts until the end of June.

Here's the weekly chart for Transocean.


Courtesy of MetaStock Xenith

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Transocean ended last week with a positive weekly chart with the stock above its key weekly moving average of $10.68 with the stock well below its 200-week simple moving average of $35.02. The weekly momentum reading is projected to rise to 31.88 this week up from 20.74 on March 4.

Investors looking to buy Transocean should consider doing so on weakness to $9.60 and $8.48, which are key levels on technical charts until the end of this week and the end of March, respectively. Investors could have bought this stock at $9.08 on Feb. 10, two days after my Feb. 8 analysis. Investors looking to reduce holdings should consider doing so if the stock rises to $26.28, which is a key level on technical charts until the end of June.

Here's the weekly chart for Tidewater.


Courtesy of MetaStock Xenith

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Tidewater ended last week positive with the stock above its key weekly moving average of $7.28 with the stock well below its 200-week simple moving average of $39.74. The weekly momentum reading is projected to rise to 40.43 this week up from 26.76 on March 4.

Investors looking to buy Tidewater should consider doing so on weakness to $6.85, which is a key level on technical charts until the end of this week. Investors looking to reduce holdings should consider doing so if the stock rises to $21.06, which is a key level on technical charts until the end of 2016.

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