[{"_id":"62e92e47e0f473e37a491574","id":1,"price":999,"price_changed":false,"prices_history":[]}]

db.collection.update({id:1},[{"$set":{"price":1000,"price_changed":{"$ne":["$price",1000]},"prices_history":{"$concatArrays":[{"$ifNull":["$prices_history",[]]},["$price"]]}}}])