Feb 25, 2015 at 1:45PM: The start of the clock. Would a sell off be day 1 of a correction or of a bear market? Some numbers: QQQ at 108.80, and spy at 212.22 areas.
A pull back to the 50-day wouldn't even invalidate the uptrend and would probably be a healthy move. Those lower highs and lower lows from Dec and January might have been the start of a major turnaround but look where it ended up.