diff --git a/backend/app/services/strategy_service.py b/backend/app/services/strategy_service.py
index 67abf6d..6088918 100644
--- a/backend/app/services/strategy_service.py
+++ b/backend/app/services/strategy_service.py
@@ -571,6 +571,12 @@ def start_strategy(req, user_id: str):
                 }
         if engine_external:
             return {"status": "already_running", "run_id": running_run_id}
+        # If caller explicitly passes a strategy, update the saved config so
+        # both the engine and future resumes use the new strategy.
+        req_strategy = getattr(req, "strategy_name", None) if req is not None else None
+        if req_strategy and req_strategy != running_cfg.get("strategy"):
+            running_cfg["strategy"] = req_strategy
+            save_strategy_config(running_cfg, user_id, running_run_id)
         engine_config = _build_engine_config(user_id, running_run_id, req)
         if engine_config:
             try: