Traders and analysts chart the movements of sto♎ck prices over time to pinpoint the support le🍸vels and resistance levels that indicate optimal times to buy and sell.
Support and resistance are two foundational concepts in technical analysis. Understanding what they are and how th💃ey work is essential to correctly reading a price chart.
Technical analysis acknowledges that all stocks rise and fall in price constantly in response to 澳洲幸运5开奖号码历史查询:supply and demand. By zeroing in on movements within a timeframe, they seek to identify patterns. A stock's price may maintain a support level, below which its price won't drop. It may also show a resistance level, at which buyers back off.ꦑ
Like many concepts in technical analysi🌱s, the explanation and rationale are relatively easy, but mastering their application can take years of practice.
Key Takeaways
- Technical analysts use support and resistance levels to identify price points on a chart where the probabilities favor a pause or reversal of a prevailing trend.
- Support occurs at the point where a downtrend is expected to pause due to a concentration of demand.
- Resistance occurs at the point where an uptrend is expected to pause due to a concentration of supply.
- Support and resistance areas can be identified on charts using trendlines and moving averages.
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Facundo Diaz Montes / Getty Images
What Is Support?
In a 澳洲幸运5开奖号码历史查询:downtrend, prices fall because there is an excess of supply over demand. The lower prices go, the more attractive ꦺthey become to those🌸 waiting on the sidelines to buy the shares.
At some level, demand that would have been slowly increasing will rise to the level where it matches supply. At this point, prices will stop falling. This is s꧑upport.
Support can be a single price level on the chart or a price zone. In any event, support is an area on a price chart that shows buyerꦺs’ willingness to buy.
It is at this level that demand will usually overwhelm supply, causing the price decline to halt and reverse.
What Is Resistance?
Resistance is the opposite of support. Prices move up because there is more demand than supply. As the prices mo♍ve higher, there will come a point when selling will overwhelm buying.
This happens for a variety of reasons. It could be that traders have determined that the prices are too high or have met their targets. It could be the reluctance of buyers to initಞiate new positions at such rich valuations.
It could be for any other number of reasons. But a technician can clearly see on a price chart a level at which supply begins to overwhelm demand. This is resistance. Like support, it can be a leඣvel or a zone.
Once an area or zone of support or resistance has been identified, those price levels can serve as potential entry or 澳洲幸运5开奖号码历史查询:exit points because, as the price reaches a point of previous support or resistance, it will do one of two things: bounce back away from the support or resistance level, or violate the price level and continue in its prior direction—until it h💖its the next support or resistance level.
T൲h♍e timing of some trades is based on the belief that support and resistance zones will not be broken. Whether the price is halted by or breaks through the support or resistance level, traders can bet on the direction of the price and quickly determine if they are correct.
If the price moves in the wrong direction (breaks through p🐻rior support or resistance levels), the positio🌟n can be closed at a small loss. If the price moves in the right direction (respects prior support or resistance levels), the move may be substantial.
The Basics
Support and resistance can be found in all charting time periods; daily, weekly, and monthly. Traders also find support and resistance in smaller time frames like one-minute and five-🐓minute charts. But the longer the time period, the more significant the support or resistance.
To identify support or resistance, you have to look༺ back at the chart to find a significant pause in a price decline or rise. Then look forward to see whether a price halts or reverses as it approaches that level.
Many experienced traders will pay attention to past support or resistance levels and place trades in antඣicipation of a futur⛦e similar reaction at these levels.
Why It Works (Or Doesn't)
Technical analysis is not an exact science, and sometimes the price will dip below support levels or reverse before it gets to the prior support level. The same is true for resistance: The price may reverse before it gets to the prior resistance level or break above💞 it.
In any case, flexibility is required in interpreting these chart patterns. This is why support and resistance levels are sometimes zones rather 🐠than precise numbers.
There is nothing magical about these price levels. It is simply that many mark𒆙et participants are acting off the same information and placing trades at similar levels.
Most experienced traders can share stories about how the price of an asset tends to halt when it gets𝐆 to a certain level.
For example, assume that Jim was holding a positio🦄n in a sto⛎ck from March to November and that he was expecting the value of the shares to increase.
Let’s imagine that Jim notices that the price fails to get above $39 s🏅everal times over several months. Traders would call the price level near $39 a level of resistance.
As you can see from the chart below, resistance levels are also regarded as a ceiling because t𒉰hese price levels represent areas where a rally runs out of gas💃.
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Support levels are the flip side of the coin. Support refers to the price level on a chart at which equilibrium is reached.
Demand has increased to match supply. This causes the decline in the price of the♎ asset to halt. The price has reached a floor.
As you ca♊n see from the chart below, the horizontal line below the price represents the price floor. You can see by the blue arrows underneath the vertical line that the price has touch꧙ed this level four times in the past. This is the level where demand comes in, preventing further declines. This is support.
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Trendlines
The examples above show that a constant level prevents an asset’s price from moving higher or lower. This static barrier is one of the most popular forms of support/resistanceꩵ.
But the prices of financial assets generally trend upward or downward, so it is not uncommon to see these price barriers change over time. This is why 澳洲幸运5开奖号码历史查询:the concepts of tren♛ding and trendlines are important when learning about support and res꧑istance.
When the market is trending to the upside, resistance levels are formed as the price action slows and starts to move back toward the 澳洲幸运5开奖号码历史查询:trendline. When𓆏 the price is moving against the🐲 prevailing trend, it is called a reaction.
Reactions can occur for a large variety of reasons, including profit-taking or near-term uncertainty for a particular issue or sector. The resulting price action undergoes a plateau effect, or a slight drop-off ꦦin stock price, creating a short-term top.
Many traders will pay close attention to the price of a security as it falls toward the broader support of the trendline because, historically, th🌟is has been an area that has prevented the price of the asset from moving substantially lower.
For example, as you can see from the Newmont Corp. (NEM) chart below, a trendline can provide support for an asset for several years. In this case, notice how the trendline propped up𝔉 the price of Newmont’s shares for an extended time.
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Image by Sabrina Jiang © Investopedia 2020
On the other hand, when the market is trending to the downside, traders will watch for a series of declining peaks and will attempt to connect these peaks together with a trendline. When the price approaches the trendline, most traders will watch for the asset to encounter selling pressure and may consider entering a short position because this is an area that has pushed the pr🃏ice downward in the past.
To be a valid trendline, the price needs to touch the trendlines at least three times. Someꦦtimes with stronger trendlines, the price will touch the trendline several times over longer time periods.
Uptrends and Downtrends
In an uptrend,𝕴 the trendline is drawn below the price, while in a downtrend, the trendline is drawn above the price.
The support/resistance of an identified level, whether discovered with a trendline or through any other method, is deemed to be s𝔍tronger the mo𒈔re times that the price has historically been unable to move beyond it.
🌄 Many technical traders will use their identified support and resistance levels to choose strategic entry/♐exit points because these areas often represent the prices that are the most influential to an asset’s direction.
Most traders are confident at these levels in the 澳洲幸运5开奖号码历史查询:underlying value of t💞he asset, so the volume generally increases more than usual, making it much more difficult for traders to continue driving the price higher or lower.
Important
Unlike th♒e rational economic actors portrayed by financial models, real human traders and investors are emotional, make cognitive errors, and fall back on heuristics or shortcuts. If people were rational, then support and resistance levels wouldn’t work in practice!
Round Numbers
Another common characteristic of support/resistance is that an asset’s price may have a difficult time moving beyond a round number, such as $50 or $100 per share. Because people have an easier time visualizing round numbe🅷rs, many inexperienced traders tend to buy or sell assets when the price is at a round number.
Also, many target prices or 澳洲幸运5开奖号码历史查询:stop orders set by either retail investors or large investment banks are placed at round price levels.𒊎 Because so many orders are placed at the same level, these round numbers tend to act as strong price barriers.
For examplಌe, if all the clients of an investment bank put in sell orders at a suggested target of $55, it would take a ♓large number of purchases to absorb these sales and create a new level of resistance.
Moving Averages
Most technical traders incorporate the 澳洲幸运5开奖号码历史查询:power of ൲various technical indicators, such as moving averages, to aid in predicting future short-term momentum. In fact, people who find it difficult to draꦆw trendlines often will substitute them for moving averages.
As you can see from the chart below, a moving average is a constantly changing line that smooths out past price data, allowing for easier identification of support and resistance. Notice how the price of th🍸e asset in the chart below finds support at the moving𒐪 average when the trend is up, and how it acts as resistance when the trend is down.
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Trad🉐ers can use moving averages in a variety of ways, such as to anticipate moves to the upsid⛄e when price lines cross above a key moving average, or to exit trades when the price drops below a moving average.
Regardleꦬss of how the moving average is used, it often creates automatic support and resistance levels. Most traders will experiment with different time periods in their moving averages so that they can find the one that works best for their trading time frame.
Other Indicators
In technical analysis, many indicators have been developed and are still being🍰 developed to identify barriers to future price action. Some indicators are plotted on price charts, wh꧟ile others are plotted above or below the price.
It takes practice and experience to learn to use them effectively. But regardless of how complex an indicator appears, its use and interpretation are often no different from that of indicators created through simpler methods like calculatinꦉg moving averages and drawing trendlines.
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The “golden ratio” used in the Fibonacci sequence, is also observed repeatedly in nature and social structure.
For example, the 澳洲幸运5开奖号码历史查询:Fibonacci retracement is a favorite tool among many short-term traders because it clearly identifies levels of potential support/resistance.꧙ Notice in the chart 🉐below how the identified levels (dotted lines) are barriers to the short-term direction of the price.
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Trading Ranges
🐟Support and resistance levels can often be relatively cl▨ose. The stock price bounces between the two levels, sometimes for a long time, without ever showing a long-term direction.
Some traders focus on exploiting these 澳洲幸运5开奖号码历史查询:sideways trends. One strategy is to place short trades as the price touches the upper trendline and long trades as the price reverses to touch the l𝕴ower trendline.
This strategy is extremely risky. It is much better to wait to see in which direction the price will break out of the range and then place yo༺ur trades in that direction.
Support and Resistance Reversals
A previous support level will sometimes become a resistance level🐼 when the price attempts to move back up. A resistance level can become a support level as the price temporarily falls back.
澳洲幸运5开奖号码历史查询:Price charts allow traders and investors to visually identify areas of support and resistance, and they give clues regarding the significance of these price le𒁏vels. More specifically, they look at:
Number of Touches
The more times that the price tests a support or resistance ar🙈ea, the more significant the level becomes. When prices keep bouncing off a support or resistance level, more buyers and sellers notice and will base trading decisions on these levels.
Preceding Price Move
Su🐷pport and resistance zones are likely to be more significant when they are preceded by steep advances or declines.
For example, a fast, steep advance or uptrend will be met with more competition and enthusiasm and may be halted by a more significant resistance level than a slow, steady advance. A slow advance may not attract as much attention. This is a good example of 澳洲幸运5开奖号码历史查询:how market psychology drives techn🅰ical inไdicators.
Volume at Certain Price Levels
The more buying and selling that has occurred at a parti𓆉cular price level, the stronger the support or resistance level is likely to be. This is because traders and investors remember these price levelꦰs and are apt to use them again.
When strong activity occurs on high volume and the price drops, a lot of selling will likely occur when the price returns to that level, since people are far more comfortable closing out a trade at the 澳洲幸运5开奖号码历史查询:breakeven point than at a loss.
Time
Support and resistance zones seen in longer time frame charts such asꦕ weekly or monthly charts are often more significant than🃏 those seen in shorter time frame charts such as the one-minute or five-minute chart.
Important
Some investors dismiss support and resistance levels entirely because they say that the levels are based on past price moves, offering no real information about what will happen in the future. They're correct: All technical analysis is based on using past price action to anticipate future price moves.
How Can Identifying Support and Resistance Levels Help Traders?
Identifying support and res༺istance levels adds discipline to a trading strategy. It🌠 establishes reasonable prices at which to buy and reasonable prices at which to sell. Otherwise, the trader may jump into a stock because it looks cheap or hold onto it in hopes it goes higher.
That, of course, is the argument of a trader who uses technical analysis. Other traders rely on fundamental analysis, which identifies stocks that represent good value based on the company's financials, its competitors, and the prevailing economic trends.
How Can Market Psychology Influence Support and Resistance Levels?
Market psychology and behavioral finance can influence where suppo💞rt and📖 resistance levels occur.
澳洲幸运5开奖号码历史查询:Anchoring, for instance, is the human tendency to assign meaning or significance to arbitrary numbers. A previously established level of support or resistance may therefore ꦰbecome an anchor at which points future resistancꦉe or support will be observed even if these points do not reflect any fundamentals.
Likewise, round numbers such as $1,000 or $25,000 may serve as support or resistance levels merely because they are symbolically𝓀 meaningful as psychological anchors.
As these levels are breached, traders may 澳洲幸运5开奖号码历史查询:adjust their anchors accordingly.
What Happens If a Price Breaks Through Its Support or Reistance?
A breakout from a support or reversal can indicate a trend reversal. If support is broken, that will likely become the new level of resistance. Alternatively, if resistance is broken to the upside, it can form the basis for support in the short terܫm.
The Bottom Line
Support and resistance levels are key concepts that form the basis of a wide variety of technical analysis tools. The basics of support and resistance consist of a support level, which can be thouꦜght of as the floor under price, and a resistance level, which can be thought of as ൲the ceiling above price. Prices fall and test the support level, which will either hold, and the price will reverse to the upside, or be violated, and the price will drop through the support and likely continue lower to the next support level.