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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 ?
training of growers on alteration of acaricides based on mode of action to facilitate long term sustainable spider mite management for agriculture in Jordan and studying the mechanisms of resistance to acaricides is very important to prevent cross resistance between closely related groups.
tabaci in the absence of cross resistance to neonicotinoids, pyriproxyfen and conventional insecticides suggest that spiromesifen can be a valuable tool in management of insecticide resistance in B.
In the present investigation, we show that Staphylococcus aureus is able to acquire a resistance against hyperforin which did not lead to a cross resistance against clinically used antibiotics.
Rifaximin has several advantages as a prophylactic agent, namely, it is safe and well tolerated, it does not modify the colonic flora, it is effective against the most commonly occurring bacterial pathogens and it has no cross resistance to the systemically available fluoroquinolone antibiotics.
In addition, the mite's resistance to certain acaricides has been shown to have cross resistance to other acaricides.
Clinically Relevant Phenotypic Resistance and Cross Resistance to Tipranavir Among Recent Routine Clinical Isolates, 4th European Resistance Workshop, Monte Carlo, March 30th, 2006, Poster 40, Virco; Lee Bacheler et al.
pyogenes is always sensitive to treatment with penicillins, but because of cross resistance from MRSA, S.