Dreaming about successfully fighting your ex can symbolize a few different things. Here are some interpretations that might resonate with you:

1. Empowerment and Closure: Successfully fighting your ex in a dream may indicate that you are gaining a sense of empowerment and closure regarding your past relationship. It could signify that you are overcoming emotional challenges or unresolved feelings associated with that person.
2. Conflict Resolution: This dream might reflect your desire to resolve lingering conflicts or issues from the relationship. It could be your subconscious mind's way of processing these feelings and seeking a resolution.
3. Personal Growth: Fighting in dreams often represents inner struggles. Successfully overcoming your ex could symbolize personal growth, showing that you have moved on and are no longer bound by past experiences.
4. Reclaiming Control: If you felt powerless in the relationship, this dream could symbolize reclaiming control over your life and decisions. It suggests that you are taking charge of your emotions and moving forward.

Consider how you felt during the dream and any specific details that stood out, as these can provide further insight. Reflecting on your current emotional state and relationships may also help clarify the dream’s meaning for you.