diff --git a/changedetectionio/blueprint/price_data_follower/__init__.py b/changedetectionio/blueprint/price_data_follower/__init__.py
index 52b941ac..a41552d8 100644
--- a/changedetectionio/blueprint/price_data_follower/__init__.py
+++ b/changedetectionio/blueprint/price_data_follower/__init__.py
@@ -18,6 +18,7 @@ def construct_blueprint(datastore: ChangeDetectionStore, update_q: PriorityQueue
     def accept(uuid):
         datastore.data['watching'][uuid]['track_ldjson_price_data'] = PRICE_DATA_TRACK_ACCEPT
         datastore.data['watching'][uuid]['processor'] = 'restock_diff'
+        datastore.data['watching'][uuid].clear_watch()
         update_q.put(queuedWatchMetaData.PrioritizedItem(priority=1, item={'uuid': uuid, 'skip_when_checksum_same': False}))
         return redirect(url_for("index"))
 
diff --git a/changedetectionio/flask_app.py b/changedetectionio/flask_app.py
index 012f015a..f07bbfcb 100644
--- a/changedetectionio/flask_app.py
+++ b/changedetectionio/flask_app.py
@@ -720,6 +720,11 @@ def changedetection_app(config=None, datastore_o=None):
 
         if request.method == 'POST' and form.validate():
 
+            # If they changed processor, it makes sense to reset it.
+            if datastore.data['watching'][uuid].get('processor') != form.data.get('processor'):
+                datastore.data['watching'][uuid].clear_watch()
+                flash("Reset watch history due to change of processor")
+
             extra_update_obj = {
                 'consecutive_filter_failures': 0,
                 'last_error' : False