My peripheral trading system generated following trade signal before close today:
"Reverse LONG AMZN to SHORT AMZN at market close on 2/20/2013"
Alert performance so far (since Feb 4th, 2013): -5.65%. See my previous posts for alert history.
Like I said, a pretty good contrary indicator to date (tough to lose 5.6% when net movement is less than that...). But, at least you are on the right side of the next 12 month move now...
The signal was generated before the trade time indicated in the alert statement. The signals can show up (rarely) before regular market open, (rarely) during regular trading hours, or (mostly) before regular market close.