The phrase "call the signals" means to be in charge or to lead. Its antonyms would be words or phrases that convey the opposite meaning, such as follow, obey, or submit. When someone "calls the signals," they are often directing or making decisions for a group or organization, whereas the antonyms suggest a more subordinate role. Other antonyms for "call the signals" could include mismanage, falter, or flounder, which indicate a lack of leadership or control. In short, the opposite of "calling the signals" is not taking charge, complying with others' commands, or struggling without direction.