trin is a measure of ratio of shares of down volume to up volume. 1.0 is netural; above 1.0 means that more shares sold on down tick; below 1 indicates more shares sold on uptick.
Looked at trinq for today. At 3:55-3:59 period it indicated a very bullish finish for day with a trinq of about 0.63. NDX went up 8 pts in those 4 minutes.
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