Market makers use mob sentiment and psychology to profit on the short side as they can see stop losses generally not specifically yours... So anytime there is a panic sell based on some incident or foreign market that has nothing to do with the stock it works to the advantage of those that "create" a market for stocks. The tools they are allowed to use tilt the playing field. The panic selling is the direct opposite of chasing a stock that is in demand. Think of buying and selling stocks like Vegas! The House gets an advantage. That is why I don't use stop losses but rather use technicals to tell me when to buy and sell. It only slightly helps, lol.
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