How can I remove identical (but negative) rows that are also in some days of each other from a SELECT on a table
SELECT *
FROM table t1
WHERE NOT EXISTS ( SELECT NULL
                   FROM TABLE t2
                   WHERE t2.`value` = -t1.`value`
                     AND t2.`date` BETWEEN t1.`date` - INTERVAL 7 DAY 
                                       AND t1.`date` + INTERVAL 7 DAY )