diff --git a/Common/Util/StreamReaderExtensions.cs b/Common/Util/StreamReaderExtensions.cs
index af959e4392c7..1606ffc2aa5b 100644
--- a/Common/Util/StreamReaderExtensions.cs
+++ b/Common/Util/StreamReaderExtensions.cs
@@ -156,6 +156,37 @@ public static int GetInt32(this StreamReader stream, char delimiter = DefaultDel
             return isNegative ? result * -1 : result;
         }
 
+        /// <summary>
+        /// Gets an integer from a stream reader
+        /// </summary>
+        /// <param name="stream">The data stream</param>
+        /// <param name="delimiter">The data delimiter character to use, default is ','</param>
+        /// <returns>The integer instance read</returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static long GetInt64(this StreamReader stream, char delimiter = DefaultDelimiter)
+        {
+            var result = 0L;
+            var current = (char)stream.Read();
+
+            while (current == ' ')
+            {
+                current = (char)stream.Read();
+            }
+
+            var isNegative = current == '-';
+            if (isNegative)
+            {
+                current = (char)stream.Read();
+            }
+
+            while (!(current == delimiter || current == '\n' || current == '\r' && (stream.Peek() != '\n' || stream.Read() == '\n') || current == NoMoreData || current == ' '))
+            {
+                result = (current - '0') + result * 10L;
+                current = (char)stream.Read();
+            }
+            return isNegative ? result * -1L : result;
+        }
+
         private readonly static ConcurrentBag<StringBuilder> StringBuilders = new();
 
         /// <summary>
diff --git a/Tests/Common/Util/StreamReaderExtensionsTests.cs b/Tests/Common/Util/StreamReaderExtensionsTests.cs
index b3fcf7232f56..e4d46125de6a 100644
--- a/Tests/Common/Util/StreamReaderExtensionsTests.cs
+++ b/Tests/Common/Util/StreamReaderExtensionsTests.cs
@@ -320,6 +320,54 @@ public void GetIntWithLineFeed()
             Assert.AreEqual(201900, smartStream.GetInt32());
         }
 
+        [Test]
+        public void GetInt64()
+        {
+            var stream = $"1588291200426000,0,1588291202486000{Environment.NewLine}1588291205550000{Environment.NewLine}".ToStream();
+            using var smartStream = new StreamReader(stream);
+
+            Assert.AreEqual(1588291200426000, smartStream.GetInt64());
+            Assert.AreEqual(0L, smartStream.GetInt64());
+            Assert.AreEqual(1588291202486000, smartStream.GetInt64());
+            Assert.AreEqual(1588291205550000, smartStream.GetInt64());
+        }
+
+        [Test]
+        public void GetNegativeInt64()
+        {
+            var stream = $"-1588291200426000,0,-1588291202486000{Environment.NewLine}-1588291205550000{Environment.NewLine}".ToStream();
+            using var smartStream = new StreamReader(stream);
+
+            Assert.AreEqual(-1588291200426000, smartStream.GetInt64());
+            Assert.AreEqual(0L, smartStream.GetInt64());
+            Assert.AreEqual(-1588291202486000, smartStream.GetInt64());
+            Assert.AreEqual(-1588291205550000, smartStream.GetInt64());
+        }
+
+        [Test]
+        public void GetInt64WithCarriageReturnAndLineFeed()
+        {
+            var stream = "1588291200426000,0,1588291202486000\r\n1588291205550000\r\n".ToStream();
+            using var smartStream = new StreamReader(stream);
+
+            Assert.AreEqual(1588291200426000, smartStream.GetInt64());
+            Assert.AreEqual(0L, smartStream.GetInt64());
+            Assert.AreEqual(1588291202486000, smartStream.GetInt64());
+            Assert.AreEqual(1588291205550000, smartStream.GetInt64());
+        }
+
+        [Test]
+        public void GetInt64WithLineFeed()
+        {
+            var stream = "1588291200426000,0,1588291202486000\n1588291205550000\n".ToStream();
+            using var smartStream = new StreamReader(stream);
+
+            Assert.AreEqual(1588291200426000, smartStream.GetInt64());
+            Assert.AreEqual(0L, smartStream.GetInt64());
+            Assert.AreEqual(1588291202486000, smartStream.GetInt64());
+            Assert.AreEqual(1588291205550000, smartStream.GetInt64());
+        }
+
         [Parallelizable(ParallelScope.None)]
         [TestCase(typeof(TradeBar), typeof(TradeBarTest), TickType.Trade)]
         [TestCase(typeof(QuoteBar), typeof(QuoteBarTest), TickType.Quote)]