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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.

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Cross resistance of spinosad resistance colony and some recommended pesticides: To detect the cross resistance between spinosad resistant colony and some recommended insecticides, many insecticides from different pesticides groups were chosen.
1997) reported absence of cross resistance to endosulfan, in imidacloprid selected strain of B.
22] reported that bifenazate-resistant strain lacked cross resistance to many different chemical classes and modes of action of other acaricides This might be applied also on the results of the present study of chlortenapyr In South Korea, Lee et al.
Its mechanism of action makes cross resistance with other antibiotics unlikely.
Because keeping someone on a regimen allowing partial suppression, but unfortunately also allowing the virus to create more and more mutations, creates more and more cross resistance, potentially losing options you've been trying to save somebody for.
Wetzler said, "TKIs are our front line of attack in CML, but significant numbers of patients have developed cross resistance to drugs in this chemical class.
One possible way to minimize both lipodystrophy and cross resistance is for somebody to start on d4T for perhaps six months, then switch over to tenofovir once their viral load is clearly less than 50 copies, for example.