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What Is Support?
Support and resistance represent key junctures where the forces of supply and demand meet. In the financial markets, prices are driven by excesses of supply (down) and demand (up). Supply is synonymous with bearish, bears and selling. Demand is synonymous with bullish, bulls and buying. These terms are used interchangeably throughout this and other articles. As demand increases, prices advance and as supply increases, prices decline. When supply and demand are equal, prices move sideways as bulls and bears slug it out for control.
What Is Support?
Support is the price level at which demand is thought to be strong enough to prevent the price from declining further. The logic dictates that as the price declines towards support and gets cheaper, buyers become more inclined to buy and sellers become less inclined to sell. By the time the price reaches the support level, it is believed that demand will overcome supply and prevent the price from falling below support.
Amazon.com, Inc. (AMZN) Support and Resistance example chart from StockCharts.com
Support does not always hold, however, and a break below support signals that the bears have won out over the bulls. A decline below support indicates a new willingness to sell and/or a lack of incentive to buy. Support breaks and new lows signal that sellers have reduced their expectations and are willing sell at even lower prices. In addition, buyers could not be coerced into buying until prices declined below support or below the previous low. Once support is broken, another support level will have to be established at a lower level.
Where Is Support Established?
Support levels are usually below the current price, but it is not uncommon for a security to trade at or near support. As technical analysis is not an exact science, setting precise support levels can often be difficult. In addition, price movements can be volatile and briefly dip below support. For example, it does not seem logical to consider a support level broken if the price closes an eighth below the established support level. For this reason, some traders and investors establish support zones.
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