The biggest market decline in... 300 years?

Mr. Prechter is convinced that we have entered a market decline of staggering proportions — perhaps the biggest of the last 300 years.

In a series of phone conversations and e-mail exchanges last week, he said that no other forecaster was likely to accept his reasoning, which is based on his version of the Elliott Wave theory — a technical approach to market analysis that he embraces with evangelical fervor.