The professional trader can see the grouping of stop loss trade orders. They can use the news of the day hour or minute to get the market down to bust your trade, knowing full well that prices will most likely be higher in the next week or month. Not a bad 'Bugsy' business if you can get it!
Of course the retail investor can wise up and trade the Wyckoff test as well and ride the professional traders stop busting pattern for profit. You just have to be aware of the pattern.
"Keep the number of stocks you own to a controllable number. It is hard to herd cats, and it is hard to track many securities. Take your losses quickly and do not brood about them. Try to learn from them but mistakes are as inevitable as death." ~ Jesse Livermore
"Money couldn't buy friends, but you got a better class of enemy." ~ Spike Milligan