Oil is down nearly 2.5% as I write due to concern that U.S. producers will be ramping up their output due to stronger prices. For weeks, now, crude oil has been in a very tight range of only about $2. The key, though, is the lower end of that range – about $52 – because if broken, we could finally see the uptrend snapped and a move back into the upper 40s, dragging energy stocks down with it.