EVERY returns true if the supplied boolean_expression is true in all of the selected rows; and returns false otherwise, that is, if the supplied boolean_expression is false in any of the selected rows.
EVERY is the dual of ANY.
EVERY ( <boolean_expression> )
The following SQL snippet returns 'true' if the price for every ticker in the stream of trades is below 1; and 'false' if any price is 1 or greater.
SELECT EVERY (ticker < 1) FROM trades
GROUP BY (FLOOR trades.rowtime to hour)