If you've been waiting for an opportunity to add an energy trust to your portfolio, then your moment may be right around the corner.

Profit-taking in master limited partnerships like Kinder Morgan Energy Partners (KMP) has taken the stock lower for four days in a row heading into trading on Wednesday, including a drop of nearly 2% on Tuesday. This selling has put KMP in technically oversold territory for the second time in a week.

Also pulling back among pipeline stocks is Plains All American Pipeline (PAA), which just broke down below a short-term trading range above its 200-day moving average, to finish technically oversold and lower for a second day in a row.

Elsewhere in the stock market, shares of Caribou Coffee Company (CBOU) pulled back by over 0.5% on Tuesday, finishing lower for a third day in a row. CBOU was trading at new 52-week highs as recently as mid-February, but is now on the outskirts of technically oversold territory after retreating to new, two-week lows for a second consecutive session.

This sell-off takes CBOU below a short-term trading range during which the stock was oversold for much of the time (in late February). Compare the trading in Caribou Coffee to that of Peet's Coffee & Tea (PEET), which has finished higher for six days in a row, closing short-term overbought for the last four.

By the way, a few weeks ago we took a look at stocks of auto parts companies like Autozone (AZO) and Genuine Parts Company (GPC). Since rallying to new 52-week highs in late February, shares of another auto parts company, Monro Muffler Brake (MNRO), have been selling off with increasing intensity. Down four days in a row ahead of trading on Wednesday, MNRO is now technically oversold for the first time since the beginning of the year.

If trading gaps in stocks and exchange-traded funds is something you'd like to add to your arsenal of trading techniques, the click the link to read about the latest from Larry Connors Trading Strategy Series: How to Trade High Probability Stock Gaps.

David Penn is Editor in Chief of TradingMarkets.com

Disclaimer: The views represented in this column are those of the individual authors only, and do not necessarily represent the views of Schaeffer's Investment Research.