The Energy sector (XLE) showed little movement on a trading day that saw S&P 500 fall 1%.

As a proxy for the sector, the ETF tracked closer to the overall market today than over the past month. Entering today's trading, XLE was up 8.1% over the last thirty trading days. The S&P 500, in comparison, went up 2%.

Continental Resources (CLR) fell 5.2% to close at $72.13, crossing its 50-day moving average of $69.09. Meanwhile, Nexen (NXY) climbed 51.8% to close at $25.90, moving past its 200-day moving average of $17.38.

Arch Coal (ACI) rose 2.6% to close at $6.32, approaching its 50-day moving average of $6.36. It has also moved closer to its 200-day moving average of $9.88. SM Energy (ESV) fell 4.6% to close at $50.53, moving closer to its 50-day moving average of $49.32. Also, the stock moved closer to its 200-day moving average of $50.17.

Lucas Energy (LEI) was a significant gainer in the sector, rising 8.5%. The stock closed at $1.66 with 477,615 shares moving. The stock traded in a range of $1.54 to $1.82. Shares have been on an upward trajectory over the past month, rising 16 cents (10.7%) from a price of $1.50 on June 21, 2012.

Clayton Williams Energy (CWEI) was a major loser in the sector, falling 7.1% (-$3.55) to close at $46.58 with 95,092 shares moving. The stock traded between $45.62 and $48.63.