I have an indicator I call my "get the hell out" indicator. Of course I have to wait for the bar to close to get it's true read. However, when prices fluctuate around the get out price it will flash (red). Waiting for the bar to finish is like watching a tree grow. There is another wrinkle to this indicator. 83% of the time prices will continue in the same direction or at lest test the previous high or low IF the NEXT bar reverses it's (the indicator) reading. Another consideration is that testing proved prices will pull back 50% into my trending bars 57% of the time and 100% of the bar 9% of the time and continue on. This gives me an opportunity to add to my position if I feel confident (yeah right). The strength of the trend was already mentioned and I certainly agree. However, it takes only one panic stricken trader anywhere in the world to push a single button and we're off to the races. If prices are sitting on a significant support or resistance level (obviously) or a HOD or LOD this can be the most profitable trade of the day (stop running). I'm a futures trader so the dynamics of my example may be worthless on an individual stock. The idea I'm offering is know your market.
IMO,
A: Most new traders jump from market to market looking for quick and easy profits (there ain't none), losing money here and there and never really learn to trade at all.
B: The most profitable trades are the hardest to take.
Test, test, test.
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