Agreed. Real-time $TICK and $TRIN are critical for daytrading. I would also submit that real-time $CPC (put call ratio) and $VIX are equally as important if not more important that $TICK and $TRIN, as they measure the sentiment and relative positioning (bullishness / bearishness) of market participants, which i find give an earlier warning than breadth based market internal indicators like $TICK and $TRIN.