lexus - When a security is trending strongly either up or down, overbought/oversold oscillators are useless. The oils are in such a strong uptrend, that pull-backs are virtually non-existant. I suggest you gradually scale in to XOM (P/E 14.73), CVX (p/e 9.69), and DVN (p/e 9.69). If you keep 1/3 of your funds in each of these three issues, you will be forced to sell the rallies and buy the dips just to keep them evenly divided, since they don't always move in the same direction at the same time.
On the other hand, you could always buy MSFT (p/e 28) which is in a strong down-trend (and apparently over-sold)