diff --git a/src/main/java/com/rusefi/can/analysis/ByteRateOfChange.java b/src/main/java/com/rusefi/can/analysis/ByteRateOfChange.java
index 7a2a008..5b19b10 100644
--- a/src/main/java/com/rusefi/can/analysis/ByteRateOfChange.java
+++ b/src/main/java/com/rusefi/can/analysis/ByteRateOfChange.java
@@ -59,7 +59,7 @@ public class ByteRateOfChange {
             for (int byteIndex = 0; byteIndex < packet.getData().length; byteIndex++) {
                 ByteId key = new ByteId(packet.getId(), byteIndex);
                 ByteStatistics stats = traceFileMetaIndex.statistics.computeIfAbsent(key, byteId -> new ByteStatistics(key));
-                stats.uniqueValues.add((int) packet.getData()[byteIndex]);
+                stats.registerValue(packet.getData()[byteIndex]);
             }
         }
         return traceFileMetaIndex;
@@ -78,9 +78,12 @@ public class ByteRateOfChange {
     }
 
     public static class ByteStatistics {
-        HashSet<Integer> uniqueValues = new HashSet<>();
+        private final HashSet<Integer> uniqueValues = new HashSet<>();
+        int totalTransitions;
         private final ByteId key;
 
+        private int previousValue;
+
         public ByteStatistics(ByteId key) {
             this.key = key;
         }
@@ -100,6 +103,16 @@ public class ByteRateOfChange {
                     ", key=" + key +
                     '}';
         }
+
+        public void registerValue(int value) {
+            if (!uniqueValues.isEmpty()) {
+                if (previousValue != value)
+                    totalTransitions++;
+            }
+
+            previousValue = value;
+            uniqueValues.add(value);
+        }
     }
 
 
diff --git a/src/main/java/com/rusefi/can/analysis/ByteRateOfChangeReports.java b/src/main/java/com/rusefi/can/analysis/ByteRateOfChangeReports.java
index 8191cc6..44c5022 100644
--- a/src/main/java/com/rusefi/can/analysis/ByteRateOfChangeReports.java
+++ b/src/main/java/com/rusefi/can/analysis/ByteRateOfChangeReports.java
@@ -53,7 +53,7 @@ public class ByteRateOfChangeReports {
                 String msg = id + ": " + s1.getUniqueValuesCount() + " vs " + s2.getUniqueValuesCount();
                 int deltaCount = Math.abs(s1.getUniqueValuesCount() - s2.getUniqueValuesCount());
                 differences.add(new ByteVariationDifference(deltaCount, msg));
-                report.println(msg + " delta=" + deltaCount);
+                report.println(msg + " delta=" + deltaCount + " / " + s1.totalTransitions + " vs " + s2.totalTransitions);
             }
         }