[cflsystems]

amy2003 is right - it is most likely the php file that sets the indicator value. You need to look in product.php and products.php. There will be a SQL statement selecting all extra fields and their values and then some line that sets the indicator based on its extra field value (code could be in /modules/Extra_Fields/extra_fields.php or in one of the products related functions in include/func/func.product.php). There could also be a clause in the SQL to say "select all products where indicator is greater then 0" so like amy2003 says products with less then 0 indicator may not be selected at all