I've been burned by UWTI in the past, and can confirm that it is NOT a good instrument for trading oil. Intraday gaps can kill you, as the index is comprised of derivatives that are rebalanced each night. It would be a great tool if in fact it did closely align itself to crude or the drillers, but it doesn't.
You'll have better luck with oil by pulling out your Black & Decker and punching a hole in your backyard.