Semiconductors suffered heavy selling which broke support of the rising wedge in a 5% loss. This had obvious knock on effects to other indices such as the Nasdaq and S&P. It's too early to say if this is the start of a major swing high or just a heavier than expected selling day. The key thing from the Semiconductor Index is the gap down from the sell off, breaching support and the 20-day MA undercut. If this is a significant breakdown, then the gap can't be closed (and really, shouldn't be challenged). It's going to take a few weeks for this to recover, even if it does recover. Semiconductors have come a long way in the last five years, but now looks a time for a period of sideways action.