The net of the number of stocks whose closing prices are higher than their previous trades (uptick) against the number of stocks whose closing prices were lower than their previous trades (downtick). A positive closing tick indicates "buying at the close", or a bullish market; a negative closing tick indicates "selling at the close," or a bearish market. See: TRIN.
The number of stocks on an exchange where the closing price is higher than the trade immediately before the closing trade minus the number of stocks, where the closing price was lower than the next-to-last trade. A positive closing tick is seen as bullish, while a negative closing tick is seen as negative. This is a technical indicator.