The term Uptick is used to describe a rise in the price of a financial security since the preceding exchange.
An uptick happens when a stock’s price increases in in comparison to the last tick or the last trade.
An uptick is also alluded to as a plus tick.
Since the year 2001, the base tick size for securities exchanging above $1 is 1 cent.
That implies that a security that moves from $10 to at least $10.01 would be viewed as to be on an uptick.
A security can only encounter an uptick if enough people are want to step in and purchase it.
Consider a security that is exchanging at $10 / $10.01.
In the event that the existing estimation for the security is bearish, sellers will hesitate little in selling at $10, as opposed to waiting for a higher price.
Similarly, potential purchasers will be happy to be patient for a lower price, given the bearish sentiment, and may lower their bid for the security to, say, $9.95. If the security's sellers largely outnumber purchasers, this lower bid will probably be taken by them.
In this way, the security may trade down to $9.80, for instance, without an uptick.
Now, be that as it may, the selling pressure may have lightened due to the remaining sellers are willing to wait, while purchasers who think the security is cheap may expand their offer to $9.81.
If a exchange happens at $9.81, it would be viewed as an uptick, since the past exchange was at $9.80.