diff --git a/src/_common/ObsoleteV2.cs b/src/_common/ObsoleteV2.cs
index 7428aee29..540e097b4 100644
--- a/src/_common/ObsoleteV2.cs
+++ b/src/_common/ObsoleteV2.cs
@@ -28,8 +28,8 @@ public static partial class Indicator
     [Obsolete("Rename 'ToTupleCollection(..)' to 'ToTupleChainable(..)' to fix.", false)]
     public static Collection<(DateTime Date, double Value)> ToTupleCollection(
     this IEnumerable<IReusableResult> reusable)
-    => reusable
-        .ToTupleChainable();
+        => reusable
+            .ToTupleChainable();
 
     [ExcludeFromCodeCoverage]
     [Obsolete("Rename 'ToTupleCollection(NullTo..)' to either 'ToTupleNaN(..)' or 'ToTupleNull(..)' to fix.", false)]
@@ -50,6 +50,14 @@ public static partial class Indicator
         return results;
     }
 
+    // v2.4.10
+    [ExcludeFromCodeCoverage]
+    [Obsolete("Change 'GetStarcBands()' to 'GetStarcBands(20)' to fix.", false)]
+    public static IEnumerable<StarcBandsResult> GetStarcBands<TQuote>(
+        this IEnumerable<TQuote> quotes)
+        where TQuote : IQuote
+        => quotes.GetStarcBands(20);
+
 #pragma warning restore CA1002 // Do not expose generic lists
 }
 
diff --git a/src/s-z/StarcBands/StarcBands.Api.cs b/src/s-z/StarcBands/StarcBands.Api.cs
index 49094ef5e..ece5d9af0 100644
--- a/src/s-z/StarcBands/StarcBands.Api.cs
+++ b/src/s-z/StarcBands/StarcBands.Api.cs
@@ -8,7 +8,7 @@ public static partial class Indicator
     ///
     public static IEnumerable<StarcBandsResult> GetStarcBands<TQuote>(
         this IEnumerable<TQuote> quotes,
-        int smaPeriods = 20,
+        int smaPeriods,
         double multiplier = 2,
         int atrPeriods = 10)
         where TQuote : IQuote => quotes
diff --git a/tests/indicators/s-z/StarcBands/StarcBands.Tests.cs b/tests/indicators/s-z/StarcBands/StarcBands.Tests.cs
index 87e6ffbdc..d33ef73de 100644
--- a/tests/indicators/s-z/StarcBands/StarcBands.Tests.cs
+++ b/tests/indicators/s-z/StarcBands/StarcBands.Tests.cs
@@ -66,13 +66,13 @@ public void BadData()
     public void NoQuotes()
     {
         List<StarcBandsResult> r0 = noquotes
-            .GetStarcBands()
+            .GetStarcBands(10)
             .ToList();
 
         Assert.AreEqual(0, r0.Count);
 
         List<StarcBandsResult> r1 = onequote
-            .GetStarcBands()
+            .GetStarcBands(10)
             .ToList();
 
         Assert.AreEqual(1, r1.Count);
diff --git a/tests/performance/Perf.Indicators.cs b/tests/performance/Perf.Indicators.cs
index e482e21ec..030f31a2e 100644
--- a/tests/performance/Perf.Indicators.cs
+++ b/tests/performance/Perf.Indicators.cs
@@ -262,7 +262,7 @@ public object GetEmaStream()
     public object GetSmma() => h.GetSmma(10);
 
     [Benchmark]
-    public object GetStarcBands() => h.GetStarcBands();
+    public object GetStarcBands() => h.GetStarcBands(10);
 
     [Benchmark]
     public object GetStc() => h.GetStc();