Only twice before the present period has the S&P tested the very top of the channel and both times were met with substantial subsequent pullbacks. Now, having substantially exceeded the channel for some time, the S&P has just begun to puncture its way back in. This could be a blow-off top that brings stock prices back to the reality of sustainable growth. I expect such a violation of the top of the channel will be met with an equally vicious correction that breaches the bottom of the channel potentially bringing 2600 into play.