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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 ?
Ketamine does not increase pulmonary vascular resistance in children with pulmonary hypertension undergoing sevoflurane anesthesia and spontaneous ventilation.
28) Detection of PAH with underlying genetic mutations is important because individuals with BMPR2 mutations tend to present at a younger age, have higher pulmonary vascular resistance, have a failure of response to vasodilators, and are more likely to succumb to the disease at an earlier age with more-severe disease.
Pulmonary vascular resistance predicts early mortality in patients with diffuse fibrotic lung disease and suspected pulmonary hypertension.
Flap valve double patch closure of ventricular septal defects in children with increased pulmonary vascular resistance.
A study using losartan in PAH secondary to chronic obstructive pulmonary disease was also in the acute setting and oral dosing with losartan (50 mg) produced a significant reduction in mean PAP and total pulmonary vascular resistance (8).
Pulmonary arterial hypertension (PAH) is characterized by elevated pulmonary vascular resistance that subsequently leads to right heart failure.
Traditionally, pulmonary arterial hypertension is thought of as a disease of the peripheral lung vasculature, wherein excessive vasoconstriction and/or structural remodeling of the small pulmonary blood vessels are the major contributors to increased pulmonary vascular resistance and right ventricular overload.
The overall effect of bosentan treatment was to lower pulmonary vascular resistance by 23%, compared with placebo, a statistically significant effect.
In addition to measuring pulmonary artery pressure, right heart catheterization can provide information for the calculation of pulmonary vascular resistance, cardiac output and the presence and extent of intracardiac shunts.
The clinical characteristics of PAH include persistently elevated pulmonary arterial pressure, in combination with normal PCWP and increased pulmonary vascular resistance.
3]) for 5 hr/day for 3 days decreased the lumen:wall area ratio of small pulmonary arteries in rats, indicating increased pulmonary vascular resistance (Batalha et al.
Neither elevated pulmonary vascular resistance, sensitization, prior support with a left ventricular assist device, nor a history of previous heart transplant influenced overall survival rates, according to a review of 536 patients who received heart transplants between 1993 and 1999 at Columbia University College of Physicians and Surgeons in New York.

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