Welcome to phase 4 and congratulations you keeped your goal weight for 1 month and this is also the end for all diets u will ever need.
You know now ur body perfectly and this the best feeling you can ever get I call this the feeling of control. you know the exact amount of carbs you can eat and still hold your goal weight. Now you can start eating what ever you want till your maximum amount of carbs a day.
Phase 4 will last your whole live and thats why phase 4 is also called the life time maintenance.