Quote from Covertibility:
Even if trades are posted real time doesn't mean the poster is actually involved in the trade. If everyone sees a flag breaking to the downside, everyone will try to short it and as a result no one will get a fill, why? First ya can't short w/o an uptick...
Depends on what your trading and how much hesitation your have (price chase range) after you receive a trade signal.
Simply...there are lots of trading vehicles that don't have an uptick rule.
Also...not everyone will see a flag breaking to the downside or not everyone will see the same exact same pattern as you may see know matter how much common knowledge about that pattern.
What you see on a particular chart interval as a flag (continuation pattern)...someone else may see on another chart interval as a Spike & Ledge pattern failure...another trader may see on another chart interval as a counter-thrust failure...another trader may see a Bearish Engulfing candlestick reversal pattern on a completely different chart interval...
et cetera.
Thus...I can go out on the limb to say that you, I and another trader are looking for different trade signals via patterns, price action, indicators or whatever...
therefore are not trying to enter that particular trading vehicle about the same time.
Think outside the box.
Its a big world out there in the markets.
NihabaAshi