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Related to Airway resistance: Upper Airway Resistance Syndrome


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 ?
Nasal airway resistance and complications following functional septoplasty: A ten-year follow-up study.
Airway resistance (Raw) in the pulmonary airways is the result of the molecular friction as the air travels in and out of the airway.
A cause of excessive daytime sleepiness: The upper airway resistance syndrome.
The transitions from wakefulness to sleep and from NREM to REM sleep also place the individual at risk for hypoventilation as a result of sleep-related impairment of strategies for compensating with upper airway load (upper airway resistance) compensation.
All patients underwent spirometry and whole-body plethysmography (MasterScreen[R] Body, CareFusion, Hochberg, Germany) yielding the following parameters: vital capacity (VC), [FEV.sub.1], Tiffeneau index ([FEV.sub.1]%VC), residual volume (RV), total lung capacity (TLC), ratio of residual volume to TLC (RV%TLC), and specific total airway resistance ([sR.sub.tot]).
Increased sputum production due to reduced mucociliary clearance might increase the airway resistance [10].
Furthermore, we have recently investigated airway resistance with symmetric branching angles up to the 20th generation for inspiration and expiration [36].
Airway resistance as determined by the forced intubation technique was significantly higher in the OVA group than the control group at 30 mg/ml inhaled methacholine.
During the last decade, both clinical and experimental studies have shown the beneficial effect of sevoflurane on asthma by reducing airway resistance [9, 11, 21], although little is known regarding the exact mechanisms.
Studies for evaluating nasal airway resistance and obstruction first started in the 19th century, and many tests and measuring methods have been devised to date.
Conclusions: Our findings suggest that presence of increased peripheral airway resistance in late-preterms as compared to term-born controls.
Others include upper airway resistance syndrome, a condition that is similar to obstructive sleep apnea, though the episodes without breathing tend to be a little longer with upper airway resistance syndrome.

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