Let me enter the discussion, may I...
All participants in the market help create the market. If there were not short-sellers for example some would think that it would be much better because we wouldn't have had the crashes and the economic depressions that usually follow them, and everyone suffers etc. But just think if there were no short-sellers! When everyone had bought and there was no buyer left and let's say some specific price was at 100, because there wouldn't be any buyer left no-one could sell anything to anybody and the market would simply freeze, and a dynamic and prosperous economy needs continuous money circulation in order to survive. So... when there is no buyer left and the price is at 100 the incentive for the market to move comes from those who sell short. When they sell short the price falls from 100 to 90 for example. When it falls to 90 people get scared and don't buy anymore, so the market can be frozen again because there will be so many sellers, out of panic, and no buyer. Here the short-sellers are useful again where they cover their shorts and the price can rise a little bit and other people start to follow, out of greed, and this circle continues. So traders are the essential part of the market, not exactly as I mentioned but that would be the simplistic situation The same thing is about daytraders, scalpers and so on, although I believe that cempetition dictates everything, if there are too many people using the same technique successfully then there will be little money in it
All participants in the market help create the market. If there were not short-sellers for example some would think that it would be much better because we wouldn't have had the crashes and the economic depressions that usually follow them, and everyone suffers etc. But just think if there were no short-sellers! When everyone had bought and there was no buyer left and let's say some specific price was at 100, because there wouldn't be any buyer left no-one could sell anything to anybody and the market would simply freeze, and a dynamic and prosperous economy needs continuous money circulation in order to survive. So... when there is no buyer left and the price is at 100 the incentive for the market to move comes from those who sell short. When they sell short the price falls from 100 to 90 for example. When it falls to 90 people get scared and don't buy anymore, so the market can be frozen again because there will be so many sellers, out of panic, and no buyer. Here the short-sellers are useful again where they cover their shorts and the price can rise a little bit and other people start to follow, out of greed, and this circle continues. So traders are the essential part of the market, not exactly as I mentioned but that would be the simplistic situation The same thing is about daytraders, scalpers and so on, although I believe that cempetition dictates everything, if there are too many people using the same technique successfully then there will be little money in it
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