lower support level; lower support line
Technical term in finance, especially for stock prices. Refers to a price level where a downward trend is expected to pause due to a concentration of demand.
See also: 支持線
This stock has broken below its lower support line.
If the lower support level holds, a rebound can be expected.
Support line in general; 下値支持線 specifically refers to the lower support level, often contrasted with 上値抵抗線 (upper resistance line).
Compound of 下値 (したね, 'lower price') + 支持線 (しじせん, 'support line'). A straightforward financial term.