chore: import upstream snapshot with attribution

Algorithm/Alphas/NullAlphaModel.py

@@ -0,0 +1,26 @@
+# QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+# Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from AlgorithmImports import *
+
+class NullAlphaModel(AlphaModel):
+    '''Provides a null implementation of an alpha model'''
+
+    def update(self, algorithm, data):
+        ''' Determines an insight for each security based on it's current MACD signal
+        Args:
+            algorithm: The algorithm instance
+            data: The new data available
+        Returns:
+            The new insights generated'''
+        return []