diff --git a/KLHZ.Trader.Core.Math/Common/Lines.cs b/KLHZ.Trader.Core.Math/Common/Lines.cs
index b116f8a..f932781 100644
--- a/KLHZ.Trader.Core.Math/Common/Lines.cs
+++ b/KLHZ.Trader.Core.Math/Common/Lines.cs
@@ -13,7 +13,7 @@
         public static bool IsLinesCrossing(DateTime time1, DateTime time2, decimal val1_1, decimal val1_2, decimal val2_1, decimal val2_2)
         {
             var dtime = (decimal)(time2 - time1).TotalSeconds;
-
+            if (dtime == 0) return false;
             var dval1 = val1_2 - val1_1;
             var k1 = dval1 / dtime;
             var b1 = val1_1;
@@ -25,8 +25,11 @@
             if (k1 != k2)
             {
                 var cross = LinesCrossing(k1, b1, k2, b2);
-                var crossingTimestamp = time1.AddSeconds((double)cross.x);
-                return crossingTimestamp >= time1 && crossingTimestamp <= time2;
+                if (cross.x>=0 && cross.x <= dtime)
+                {
+                    var crossingTimestamp = time1.AddSeconds((double)cross.x);
+                    return crossingTimestamp >= time1 && crossingTimestamp <= time2;
+                }
             }
             return false;
         }
diff --git a/KLHZ.Trader.Core.Tests/MovingAverageTests.cs b/KLHZ.Trader.Core.Tests/MovingAverageTests.cs
new file mode 100644
index 0000000..1680478
--- /dev/null
+++ b/KLHZ.Trader.Core.Tests/MovingAverageTests.cs
@@ -0,0 +1,27 @@
+using KLHZ.Trader.Core.DataLayer.Entities.Prices;
+using KLHZ.Trader.Core.Math.Common;
+using KLHZ.Trader.Core.Math.Declisions.Services.Cache;
+using KLHZ.Trader.Core.Math.Declisions.Utils;
+
+namespace KLHZ.Trader.Core.Tests
+{
+    public class MovingAverageTests
+    {
+        [Test]
+        public void Test1()
+        {
+            var cacheUnit = new PriceHistoryCacheUnit2("");
+            for (int i = 0; i < 5 * PriceHistoryCacheUnit2.CacheMaxLength; i++)
+            {
+                cacheUnit.AddData(new PriceChange() { Figi = "", Ticker = "", Value = i, Time = DateTime.UtcNow });
+                if (i >= 500)
+                {
+                    var data = cacheUnit.GetData().Result;
+                    Assert.IsTrue(data.prices.Length == PriceHistoryCacheUnit2.CacheMaxLength);
+                    Assert.IsTrue(data.prices.Last() == i);
+                    var res = MovingAverage.CheckByWindowAverageMean(data.timestamps, data.prices, 100);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file