Correction
What Does Correction Mean?
A
reverse movement, usually negative, of at least 10% in a stock, bond,
commodity or index. Corrections are generally temporary price declines,
interrupting an uptrend in the market or asset.
Investopedia explains Correction
A healthy market will correct from time to time.
Technical Correction
:
What Does Technical Correction Mean?
A
decrease in the market price of an asset or entire market after
extensive price increases. A technical correction occurs even when there
is no evidence that the increasing price trend should cease. It is
often caused when investors temporarily slow down their purchases of
securities, which commonly leads to a pullback toward a short-term
support level.

Investopedia explains Technical CorrectionA
technical correction is a drop in stock or market prices when there is
no fundamental reason for a decrease. After a steady increase in value,
investors may become more cautious buyers at the higher prices and look
to reevaluate the market, resulting in a decrease in purchases. The drop
in purchase volume will stop the upward price trend from
continuing while the market re-evaluates the short-term direction.
Technical Decline
What Does Technical Decline Mean?
A
technical decline is a fall in the price of a security caused by
factors other than a change in the fundamental value of the security.
Typically a security is said to experience a technical decline when the
security or the overall market are trending upwards overall and the
price dips downward based on technical factors. Generally the
connotation is that a technical decline will prove to be only a
momentarily dip in demand, followed by an appreciation back to the fair
market value suggested by business fundamentals.

Investopedia explains Technical Decline
Proponents
of the efficient market hypothesis dismiss the concept of a technical
decline as being inconsistent with what they see as the rational
price-setting mechanisms of the stock market. These theorists contend
that if the price of a security were to deviate significantly from its
fundamental value, market participants would quickly recognize an
opportunity for profits and buy the security, increasing its price until
it returns to its fundamental value. By contrast, many other investors
believe that with sufficient research, it is possible to identify
temporary windows in which undervalued securities can be bought,
allowing for significant gains from the return to fundamental value.
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