What was an indicator of american democracy during the 1820s?

Jacksonian democracy. A movement for more democracy in American government in the 1830s. Led by President Andrew Jackson, this movement championed greater rights for the common man and was opposed to any signs of aristocracy in the nation         this is what the word .in·di·ca·tor  means :

/ˈindəˌkādər/

noun

noun: indicator; plural noun: indicators; noun: indicator species; plural noun: indicator species

   1.

   a thing, especially a trend or fact, that indicates the state or level of something.

   "car ownership is frequently used as an indicator of affluence"

the indirect evidence that supports that the bubbles so generated are oxygen is that the bubbles in the plant increases when it moves towards the brighter light.