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An effective upper bound on prices achieved because of many willing sellers at that price level.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

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).
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An increased supply of a security. Compare support.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.


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.

Dictionary of Financial Terms. Copyright © 2008 Lightbulb Press, Inc. All Rights Reserved.
References in periodicals archive ?
Non-detection of certain phylogenetic group that it is resistance to antibiotics in this study, but the important noticed that phylogenetic group B2 were normally distribution in all antibiotic resistance pattern, it may indicated Phytogenic and multidrug resistance types remained largely unchanged within patients in this study.
Bioinformatics analysis showed that these genes participated in biological pathways including drug transport, drug response, amidase transport, hydrolase activity, transferase activity, along with an amidase transmembrane transporter, efflux transmembrane transporter, bacterial chemotaxis, ABC transporters, and a b-lactam resistance gene, all of which may be related to multidrug resistance in the isolate strain of C.
Sitthichot et al., "Role of Plasmodium falciparum chloroquine resistance transporter and multidrug resistance 1 genes on in vitro chloroquine resistance in isolates of Plasmodium falciparum from Thailand," The American Journal of Tropical Medicine and Hygiene, vol.
Guyot et al., "Differential contribution of AcrAB and OqxAB efflux pumps to multidrug resistance and virulence in Klebsiella pneumoniae," Journal of Antimicrobial Chemotherapy, vol.
Therapy Development for Multidrug Resistance in Cancer, Cystic Fibrosis, and Herpes Simplex Virus Infection
The occurrence of multidrug resistance was first described by Biedler and Riehm in 1970 during incubation of leukemia cells from a Syrian hamster and mice in an increasing concentration of actinomycin D.
In this study, the fluoroquinolone-resistant strains also exhibited a high prevalence of cross-resistance to other antibiotics, and this may be explained in part by the multidrug resistance of recurrent P aeruginosa in CSOM.
The emergence of cancer multidrug resistance (MDR) has been pointed as one of the major hurdles for a successful chemotherapy.
Among all the known types of resistance, adaptive resistance is particularly inconvenient, which has been repeatedly correlated with the appearance of multidrug resistance, yet the biological processes behind its emergence and evolution are not well understood.[sup][3]
Several researches have indicated that multidrug resistance can result as a barrier for treatment of breast cancer.

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