diff --git a/README.md b/README.md
index 2b7edc9..b94752e 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,8 @@ Control simple queues.
 
 More information about simple queues can be found on [Mikrotik support page](https://wiki.mikrotik.com/wiki/Manual:Queue#Simple_Queues).
 
+NOTE: FastTracked packets are not processed by Simple Queues.
+
 ![Queue switch](https://raw.githubusercontent.com/tomaae/homeassistant-mikrotik_router/master/docs/assets/images/ui/queue_switch.png)
 
 ## Host Tracking
@@ -87,6 +89,8 @@ Feature is present in Winbox IP-Accounting. Make sure that threshold is set to r
 
 More information about Accounting can be found on [Mikrotik support page](https://wiki.mikrotik.com/wiki/Manual:IP/Accounting).
 
+NOTE: Accounting does not count in FastTracked packets.
+
 ![Accounting sensor](https://raw.githubusercontent.com/tomaae/homeassistant-mikrotik_router/master/docs/assets/images/ui/accounting_sensor.png)
 
 # Install integration
diff --git a/custom_components/mikrotik_router/mikrotik_controller.py b/custom_components/mikrotik_router/mikrotik_controller.py
index c01438d..a089d4f 100644
--- a/custom_components/mikrotik_router/mikrotik_controller.py
+++ b/custom_components/mikrotik_router/mikrotik_controller.py
@@ -1179,6 +1179,23 @@ class MikrotikControllerData:
                 ],
             )
 
+            threshold = self.api.path("/ip/accounting")[0].get("threshold")
+            entry_count = len(accounting_data)
+
+            if entry_count is threshold:
+                _LOGGER.warning(
+                    f"Accounting entries count reached the threshold of {threshold}!"
+                    " Some entries were not saved by Mikrotik so accounting calculation won't be correct."
+                    " Consider shortening update interval or"
+                    " increasing the accounting threshold value in Mikrotik."
+                )
+            elif entry_count > threshold * 0.9:
+                _LOGGER.info(
+                    f"Accounting entries count ({entry_count} reached 90% of the threshold,"
+                    f" currently set to {threshold}! Consider shortening update interval or"
+                    " increasing the accounting threshold value in Mikrotik."
+                )
+
             for item in accounting_data.values():
                 source_ip = str(item.get("src-address")).strip()
                 destination_ip = str(item.get("dst-address")).strip()