Backtest opti (#10)

* Opti backtest

* clean

src/Managing.Core/FixedSizedQueue/FixedSizeQueue.cs

@@ -0,0 +1,13 @@
+namespace Managing.Core.FixedSizedQueue;
+
+public class FixedSizeQueue<T> : Queue<T>
+{
+    private readonly int _maxSize;
+    public FixedSizeQueue(int maxSize) => _maxSize = maxSize;
+
+    public new void Enqueue(T item)
+    {
+        while (Count >= _maxSize) Dequeue();
+        base.Enqueue(item);
+    }
+}