diff --git a/custom_components/entsoe/api_client.py b/custom_components/entsoe/api_client.py
index 8066303..fa41cdb 100644
--- a/custom_components/entsoe/api_client.py
+++ b/custom_components/entsoe/api_client.py
@@ -164,10 +164,10 @@ def process_PT15M_points(self, period: Element, start_time: datetime):
 
         # now calculate hourly averages based on available points
         data = {}
-        last_position = max(positions.keys())
-        last_price = positions.get(0, 0)
+        last_hour = (max(positions.keys()) + 3) // 4
+        last_price = 0
 
-        for hour in range((last_position // 4) + 1):
+        for hour in range(last_hour):
             sum_prices = 0
             for idx in range(hour * 4 + 1, hour * 4 + 5):
                 last_price = positions.get(idx, last_price)
diff --git a/custom_components/entsoe/test/datasets/BE_15M_exact4.xml b/custom_components/entsoe/test/datasets/BE_15M_exact4.xml
new file mode 100644
index 0000000..3340dd3
--- /dev/null
+++ b/custom_components/entsoe/test/datasets/BE_15M_exact4.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+  <Publication_MarketDocument xmlns="urn:iec62325.351:tc57wg16:451-3:publicationdocument:7:3">
+    <mRID>64e2af3a87c2404cbea80edc067a1b6f</mRID>
+    <revisionNumber>1</revisionNumber>
+    <type>A44</type>
+    <sender_MarketParticipant.mRID codingScheme="A01">10X1001A1001A450</sender_MarketParticipant.mRID>
+    <sender_MarketParticipant.marketRole.type>A32</sender_MarketParticipant.marketRole.type>
+    <receiver_MarketParticipant.mRID codingScheme="A01">10X1001A1001A450</receiver_MarketParticipant.mRID>
+    <receiver_MarketParticipant.marketRole.type>A33</receiver_MarketParticipant.marketRole.type>
+    <createdDateTime>2024-10-07T14:36:40Z</createdDateTime>
+    <period.timeInterval>
+      <start>2024-10-05T22:00Z</start>
+      <end>2024-10-06T22:00Z</end>
+    </period.timeInterval>
+      <TimeSeries>
+        <mRID>1</mRID>
+        <auction.type>A01</auction.type>
+        <businessType>A62</businessType>
+        <in_Domain.mRID codingScheme="A01">10YBE----------2</in_Domain.mRID>
+        <out_Domain.mRID codingScheme="A01">10YBE----------2</out_Domain.mRID>
+        <contract_MarketAgreement.type>A01</contract_MarketAgreement.type>
+        <currency_Unit.name>EUR</currency_Unit.name>
+        <price_Measure_Unit.name>MWH</price_Measure_Unit.name>
+        <curveType>A03</curveType>
+          <Period>
+            <timeInterval>
+              <start>2024-10-05T22:00Z</start>
+              <end>2024-10-05T23:00Z</end>
+            </timeInterval>
+            <resolution>PT15M</resolution>
+              <Point>
+                <position>1</position>
+                 <price.amount>55.35</price.amount>
+              </Point>
+              <Point>
+                <position>2</position>
+                 <price.amount>44.22</price.amount>
+              </Point>
+              <Point>
+                <position>3</position>
+                 <price.amount>40.32</price.amount>
+              </Point>
+              <Point>
+                <position>4</position>
+                 <price.amount>31.86</price.amount>
+              </Point>
+          </Period>
+      </TimeSeries>
+  </Publication_MarketDocument>
diff --git a/custom_components/entsoe/test/test_api_client.py b/custom_components/entsoe/test/test_api_client.py
index e71dfb8..cc3eeb0 100644
--- a/custom_components/entsoe/test/test_api_client.py
+++ b/custom_components/entsoe/test/test_api_client.py
@@ -223,6 +223,19 @@ def test_be_15M_avg(self):
             },
         )
 
+    def test_be_exact4(self):
+        with open("./datasets/BE_15M_exact4.xml") as f:
+            data = f.read()
+
+        self.maxDiff = None
+        self.assertDictEqual(
+            self.client.parse_price_document(data),
+            {
+                # part 1 - 15M resolution
+                datetime.fromisoformat("2024-10-05T22:00:00Z"): 42.94,  # average
+            },
+        )
+
 
 if __name__ == "__main__":
     unittest.main()