lowest price; bottom price
Used in stock, commodity, and market contexts to refer to the lowest price reached during a given period or the lowest price at which something is offered.
Today's lowest price was higher than yesterday's.
The bottom price for this stock is probably near its limit.
The stock price developed into a test of its lower support level.
This stock has firm downside support, so there's little risk of a big drop.
The market fell below the expected support level.
高値 is the highest price reached in a market, the opposite extreme from 下値's lowest price.
上値 refers to an anticipated or resistance-level high price in trading, the direct counterpart to 下値's anticipated low price.
lower support level; lower support line
Compound of 下 (した, 'lower') and 値 (ね, 'price'). The reading ね for 値 is a native Japanese reading (kun'yomi).