diff --git a/RhSolutions.AddIn/Services/GuessReader.cs b/RhSolutions.AddIn/Services/GuessReader.cs
index 3824950..09bb5a0 100644
--- a/RhSolutions.AddIn/Services/GuessReader.cs
+++ b/RhSolutions.AddIn/Services/GuessReader.cs
@@ -47,19 +47,21 @@ public class GuessReader : IReader
             }
             if (currentIndex > productColumnIndex)
             {
-                if (IsAmountColumn(range.Columns[currentIndex++]))
+                if (IsAmountColumn(range.Columns[currentIndex]))
                 {
-                    amountColumnIndex = currentIndex - 1;
+                    amountColumnIndex = currentIndex;
                     break;
                 }
+                else currentIndex++;
             }
             else
             {
-                if (IsAmountColumn(range.Columns[currentIndex--]))
+                if (IsAmountColumn(range.Columns[currentIndex]))
                 {
-                    amountColumnIndex = currentIndex + 1;
+                    amountColumnIndex = currentIndex;
                     break;
                 }
+                else currentIndex--;
             }
         }
 
@@ -111,6 +113,7 @@ public class GuessReader : IReader
     {
         int successCounter = 0;
         var cells = column.Value2;
+        double maxValue = 30000;
 
         if (cells == null)
         {
@@ -125,25 +128,30 @@ public class GuessReader : IReader
                 continue;
             }
 
-            double? value = currentCell as double?; 
+            double? value = currentCell as double?;
 
             if (value == null || value == 0)
             {
                 continue;
             }
 
-            if (value > 30000)
+            if (value > maxValue)
             {
                 return false;
             }
-            
-            if (++successCounter > 3)
+
+            if (column.Rows.Count == 1)
+            {
+                return true;
+            }
+
+            if (++successCounter > 1)
             {
                 return true;
             }
         }
 
-        return successCounter > 0;
+        return successCounter > 1;
     }
 
     private Dictionary<Product, double> GetDictionaryFromColumns(Range productColumn, Range amountColumn)