noun
higher price; price rise
Used in financial contexts to refer to a price that is higher than a previous or reference price, often in contrast to 下値 (したね, lower price).
この株は上値を追うよりも、下値で拾う方が安全だ。
For this stock, it's safer to buy on dips rather than chase higher prices.
上値が重く、なかなか上がらない。
The upside is heavy and it just won't go up.