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An effective upper bound on prices achieved because of many willing sellers at that price level.

Resistance Level

In technical analysis, a price that a security does not, or only rarely, rise above. Technical analysts identify a resistance level by looking at past performance. When the security approaches the resistance level, it is seen as an indication to sell the security, which will increase the supply, causing the security's price to fall back below the resistance level. If there are too many buyers, however, the security rises above the resistance level. When this occurs, the price of the security will likely continue to rise until it finds another resistance level. It is also called the overhead resistance level. See also: Price ceiling, Support (Support level).


An increased supply of a security. Compare support.


Resistance, or resistance level, is the top of a stock's current trading range, and the point at which the price is higher than investors are willing to pay. As stockholders sell at resistance level, the stock price goes down because supply exceeds demand.

For example, if, on a repeated basis, as stock A's price reaches $60, stockholders begin to sell, then $60 is considered its resistance level. But a trading range isn't fixed and investor attitudes change, so the resistance level tends to move higher or lower over time.

If stock A rises to $63 without a surge of selling, the current resistance line has been breached. This may be the result of a rising market or a bullish assessment of the stock's value. On the other hand, if selling increases at $57, that may become the new resistance level.

Conversely, the level at which demand exceeds supply and investors typically buy a certain stock is called support. It's the point that's considered the bottom of a stock's current trading range.

Technical analysts use the concepts of resistance and support in anticipating future stock price movements.

References in periodicals archive ?
For all of these reasons, ethicists, health care researchers and social scientists have begun to examine how best to ensure that strategies for tackling drug resistance are ethically responsible.
The current study was planned to determine the prevalence and drug resistance patterns of MDR-TB in retreatment cases in Punjab.
This phenomenon, called "growth bistability," occurred as quantitatively predicted by the researchers' mathematical models, in terms of both the dependence on the drug dose, which is set by the environment, and on the degree of drug resistance a strain possesses, which is set by the genetic makeup of the strain and is subject to change during evolution.
These 'preventable' cases of drug resistance provide important lessons; avoiding these mistakes will advance clinical practice and benefit patients.
Simpler regimens using fixed-dose combinations have made it much easier for people to adhere to antiretroviral treatment, limiting the spread of drug resistance in recent years," said Gottfried Hirnschall, MD, MPH, director of WHO's HIV Department.
Talking about the drug resistant cases in Qatar, Dr Abdul Latif al Khal, consultant and director of the Medical Education Centre at Hamad Medical Corporation, said, "We are seeing an increase in drug resistance among bacteria causing urine infection.
Now, those discoveries and the generations of drugs that followed them are at risk, as high levels of drug resistance threaten their effectiveness, WHO said in a statement.
The strains that are resistant to the two main first line anti TB drugs that form the back bone of short course chemotherapy, isoniazid and rifampicin are known as multi drug resistance tuberculosis.
Continuous, routine drug resistance surveillance for all suspected TB cases has since been implemented in Tugela Ferry and >500 XDR TB cases have been diagnosed; >90% of patients are coinfected with HIV.
Pharmaceutical companies have the unique opportunity to influence the quality of drugs after manufacturing, marketing and sales through better packaging and inserts that inform patients and dispensers about appropriate use, as well as through better monitoring of supply chain conditions (to avoid the degradation of drugs and the introduction of poor products), and by educating dispensers and prescribers about drug resistance risks.
Guided by a resiliency framework (Waller, 2001), the purpose of this study was to examine the culturally specific drug resistance strategies used by Hawaiian youth in rural communities in Hawai'i.
One of the main causes of failure in the treatment of cancer is the development of drug resistance by the cancer cells.