diff --git a/README.md b/README.md
index 207eb821..2b0f7a47 100644
--- a/README.md
+++ b/README.md
@@ -529,7 +529,9 @@ After making changes, make sure you did not break any functionality:
 pytest
 ```
 
-Please make sure to update tests as appropriate.
+Make sure to update tests as appropriate.
+
+Please note: contribution to this project requires signing a Contributor Licence Agreement (CLA).
 
 ## License
 
diff --git a/apps/candlestick-patterns/app.py b/apps/candlestick-patterns/app.py
index 2cf68c2b..95fea503 100644
--- a/apps/candlestick-patterns/app.py
+++ b/apps/candlestick-patterns/app.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 # Run this app with `python app.py` and
diff --git a/vectorbt/__init__.py b/vectorbt/__init__.py
index 40a98ce8..08780e54 100644
--- a/vectorbt/__init__.py
+++ b/vectorbt/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Ultimate Python library for time series analysis and backtesting at scale.
diff --git a/vectorbt/_settings.py b/vectorbt/_settings.py
index 2902007f..2f4611f7 100644
--- a/vectorbt/_settings.py
+++ b/vectorbt/_settings.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Global settings.
diff --git a/vectorbt/_typing.py b/vectorbt/_typing.py
index cbc935e8..7cfc19ec 100644
--- a/vectorbt/_typing.py
+++ b/vectorbt/_typing.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """General types used in vectorbt."""
diff --git a/vectorbt/_version.py b/vectorbt/_version.py
index 2d265224..5d5606a5 100644
--- a/vectorbt/_version.py
+++ b/vectorbt/_version.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 __version__ = "0.21.0"
diff --git a/vectorbt/base/__init__.py b/vectorbt/base/__init__.py
index 593c87a9..b0e50d6a 100644
--- a/vectorbt/base/__init__.py
+++ b/vectorbt/base/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules with base classes and utilities for pandas objects, such as broadcasting."""
diff --git a/vectorbt/base/accessors.py b/vectorbt/base/accessors.py
index b43d5e7d..3d7b9661 100644
--- a/vectorbt/base/accessors.py
+++ b/vectorbt/base/accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom pandas accessors.
diff --git a/vectorbt/base/array_wrapper.py b/vectorbt/base/array_wrapper.py
index 1b4d17ab..3c952ec0 100644
--- a/vectorbt/base/array_wrapper.py
+++ b/vectorbt/base/array_wrapper.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class for wrapping NumPy arrays into Series/DataFrames.
diff --git a/vectorbt/base/column_grouper.py b/vectorbt/base/column_grouper.py
index da0b579a..86ee7de9 100644
--- a/vectorbt/base/column_grouper.py
+++ b/vectorbt/base/column_grouper.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class that exposes methods to group columns.
diff --git a/vectorbt/base/combine_fns.py b/vectorbt/base/combine_fns.py
index 7389cd5d..0b773030 100644
--- a/vectorbt/base/combine_fns.py
+++ b/vectorbt/base/combine_fns.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Functions for combining arrays.
diff --git a/vectorbt/base/index_fns.py b/vectorbt/base/index_fns.py
index 8ae1cf36..aa7f0a5e 100644
--- a/vectorbt/base/index_fns.py
+++ b/vectorbt/base/index_fns.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Functions for working with index/columns.
diff --git a/vectorbt/base/indexing.py b/vectorbt/base/indexing.py
index 540347ae..14173d47 100644
--- a/vectorbt/base/indexing.py
+++ b/vectorbt/base/indexing.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Classes for indexing.
diff --git a/vectorbt/base/reshape_fns.py b/vectorbt/base/reshape_fns.py
index 7e01ed54..083244fa 100644
--- a/vectorbt/base/reshape_fns.py
+++ b/vectorbt/base/reshape_fns.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Functions for reshaping arrays.
diff --git a/vectorbt/data/__init__.py b/vectorbt/data/__init__.py
index 86ec7de3..bf85e518 100644
--- a/vectorbt/data/__init__.py
+++ b/vectorbt/data/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with data sources."""
diff --git a/vectorbt/data/base.py b/vectorbt/data/base.py
index 31dd23cb..58827667 100644
--- a/vectorbt/data/base.py
+++ b/vectorbt/data/base.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base data class.
diff --git a/vectorbt/data/custom.py b/vectorbt/data/custom.py
index 78663ab8..c3207a7a 100644
--- a/vectorbt/data/custom.py
+++ b/vectorbt/data/custom.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom data classes that subclass `vectorbt.data.base.Data`."""
diff --git a/vectorbt/data/updater.py b/vectorbt/data/updater.py
index f2ff4126..b0f7f180 100644
--- a/vectorbt/data/updater.py
+++ b/vectorbt/data/updater.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class for scheduling data updates."""
diff --git a/vectorbt/generic/__init__.py b/vectorbt/generic/__init__.py
index fabb41f1..57e1cd05 100644
--- a/vectorbt/generic/__init__.py
+++ b/vectorbt/generic/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with any time series.
diff --git a/vectorbt/generic/accessors.py b/vectorbt/generic/accessors.py
index 0bcef048..734e5d6d 100644
--- a/vectorbt/generic/accessors.py
+++ b/vectorbt/generic/accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom pandas accessors for generic data.
diff --git a/vectorbt/generic/decorators.py b/vectorbt/generic/decorators.py
index 63e7ad17..23c3b68d 100644
--- a/vectorbt/generic/decorators.py
+++ b/vectorbt/generic/decorators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class and function decorators."""
diff --git a/vectorbt/generic/drawdowns.py b/vectorbt/generic/drawdowns.py
index dfba933e..4180707e 100644
--- a/vectorbt/generic/drawdowns.py
+++ b/vectorbt/generic/drawdowns.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with drawdown records.
diff --git a/vectorbt/generic/enums.py b/vectorbt/generic/enums.py
index 735a20a4..d0359ae7 100644
--- a/vectorbt/generic/enums.py
+++ b/vectorbt/generic/enums.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Named tuples and enumerated types.
diff --git a/vectorbt/generic/nb.py b/vectorbt/generic/nb.py
index 5834e690..6290170d 100644
--- a/vectorbt/generic/nb.py
+++ b/vectorbt/generic/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/generic/plot_builder.py b/vectorbt/generic/plot_builder.py
index 56a52c61..b4c6a17e 100644
--- a/vectorbt/generic/plot_builder.py
+++ b/vectorbt/generic/plot_builder.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Mixin for building plots out of subplots."""
diff --git a/vectorbt/generic/plotting.py b/vectorbt/generic/plotting.py
index 5333e8c5..ae0872ff 100644
--- a/vectorbt/generic/plotting.py
+++ b/vectorbt/generic/plotting.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base plotting functions.
diff --git a/vectorbt/generic/ranges.py b/vectorbt/generic/ranges.py
index 5fe9db37..4907cd5b 100644
--- a/vectorbt/generic/ranges.py
+++ b/vectorbt/generic/ranges.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with range records.
diff --git a/vectorbt/generic/splitters.py b/vectorbt/generic/splitters.py
index 7bacadfd..4ab6f399 100644
--- a/vectorbt/generic/splitters.py
+++ b/vectorbt/generic/splitters.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Splitters for cross-validation.
diff --git a/vectorbt/generic/stats_builder.py b/vectorbt/generic/stats_builder.py
index 11bcd707..b2f10ef5 100644
--- a/vectorbt/generic/stats_builder.py
+++ b/vectorbt/generic/stats_builder.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Mixin for building statistics out of performance metrics."""
diff --git a/vectorbt/indicators/__init__.py b/vectorbt/indicators/__init__.py
index 2989e35c..7a1f6674 100644
--- a/vectorbt/indicators/__init__.py
+++ b/vectorbt/indicators/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for building and running indicators.
diff --git a/vectorbt/indicators/basic.py b/vectorbt/indicators/basic.py
index ccf18df2..a917de0f 100644
--- a/vectorbt/indicators/basic.py
+++ b/vectorbt/indicators/basic.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Indicators built with `vectorbt.indicators.factory.IndicatorFactory`.
diff --git a/vectorbt/indicators/configs.py b/vectorbt/indicators/configs.py
index 4d865de9..e18da407 100644
--- a/vectorbt/indicators/configs.py
+++ b/vectorbt/indicators/configs.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Common configurations for indicators."""
diff --git a/vectorbt/indicators/factory.py b/vectorbt/indicators/factory.py
index b9637013..0809299d 100644
--- a/vectorbt/indicators/factory.py
+++ b/vectorbt/indicators/factory.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """A factory for building new indicators with ease.
diff --git a/vectorbt/indicators/nb.py b/vectorbt/indicators/nb.py
index 1b51c4e2..4df3e19d 100644
--- a/vectorbt/indicators/nb.py
+++ b/vectorbt/indicators/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/labels/__init__.py b/vectorbt/labels/__init__.py
index c99985e5..af4f642b 100644
--- a/vectorbt/labels/__init__.py
+++ b/vectorbt/labels/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for building and running look-ahead indicators and label generators."""
diff --git a/vectorbt/labels/enums.py b/vectorbt/labels/enums.py
index 7c45b4c1..e5a653d2 100644
--- a/vectorbt/labels/enums.py
+++ b/vectorbt/labels/enums.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Named tuples and enumerated types.
diff --git a/vectorbt/labels/generators.py b/vectorbt/labels/generators.py
index f0aec805..b6145847 100644
--- a/vectorbt/labels/generators.py
+++ b/vectorbt/labels/generators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Basic look-ahead indicators and label generators.
diff --git a/vectorbt/labels/nb.py b/vectorbt/labels/nb.py
index d1f44d10..56265ac3 100644
--- a/vectorbt/labels/nb.py
+++ b/vectorbt/labels/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/messaging/__init__.py b/vectorbt/messaging/__init__.py
index d07cbb18..096bceb7 100644
--- a/vectorbt/messaging/__init__.py
+++ b/vectorbt/messaging/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for messaging."""
diff --git a/vectorbt/messaging/telegram.py b/vectorbt/messaging/telegram.py
index 7ce66339..2b2e3557 100644
--- a/vectorbt/messaging/telegram.py
+++ b/vectorbt/messaging/telegram.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Messaging using `python-telegram-bot`."""
diff --git a/vectorbt/ohlcv_accessors.py b/vectorbt/ohlcv_accessors.py
index d2e05d0a..32b75d30 100644
--- a/vectorbt/ohlcv_accessors.py
+++ b/vectorbt/ohlcv_accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom pandas accessors for OHLC(V) data.
diff --git a/vectorbt/portfolio/__init__.py b/vectorbt/portfolio/__init__.py
index 15e9c51d..f4915856 100644
--- a/vectorbt/portfolio/__init__.py
+++ b/vectorbt/portfolio/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with portfolios."""
diff --git a/vectorbt/portfolio/base.py b/vectorbt/portfolio/base.py
index 098a500e..5b8b490f 100644
--- a/vectorbt/portfolio/base.py
+++ b/vectorbt/portfolio/base.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for modeling portfolio and measuring its performance.
diff --git a/vectorbt/portfolio/decorators.py b/vectorbt/portfolio/decorators.py
index 4554d981..284b6c3c 100644
--- a/vectorbt/portfolio/decorators.py
+++ b/vectorbt/portfolio/decorators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class and function decorators."""
diff --git a/vectorbt/portfolio/enums.py b/vectorbt/portfolio/enums.py
index 1edbf36f..3de840fd 100644
--- a/vectorbt/portfolio/enums.py
+++ b/vectorbt/portfolio/enums.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Named tuples and enumerated types.
diff --git a/vectorbt/portfolio/logs.py b/vectorbt/portfolio/logs.py
index 5bc5f18b..8c810e09 100644
--- a/vectorbt/portfolio/logs.py
+++ b/vectorbt/portfolio/logs.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with log records.
diff --git a/vectorbt/portfolio/nb.py b/vectorbt/portfolio/nb.py
index 8e7d8fa7..0aea63d3 100644
--- a/vectorbt/portfolio/nb.py
+++ b/vectorbt/portfolio/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/portfolio/orders.py b/vectorbt/portfolio/orders.py
index ce13b45c..672d30d6 100644
--- a/vectorbt/portfolio/orders.py
+++ b/vectorbt/portfolio/orders.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with order records.
diff --git a/vectorbt/portfolio/trades.py b/vectorbt/portfolio/trades.py
index e0a77d22..bb15ca64 100644
--- a/vectorbt/portfolio/trades.py
+++ b/vectorbt/portfolio/trades.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with trade records.
diff --git a/vectorbt/px_accessors.py b/vectorbt/px_accessors.py
index b7670d01..6b3bae10 100644
--- a/vectorbt/px_accessors.py
+++ b/vectorbt/px_accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Plotly Express pandas accessors.
diff --git a/vectorbt/records/__init__.py b/vectorbt/records/__init__.py
index fa573a52..3d44b9a1 100644
--- a/vectorbt/records/__init__.py
+++ b/vectorbt/records/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with records.
diff --git a/vectorbt/records/base.py b/vectorbt/records/base.py
index 01363f24..bd1b5497 100644
--- a/vectorbt/records/base.py
+++ b/vectorbt/records/base.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with records.
diff --git a/vectorbt/records/col_mapper.py b/vectorbt/records/col_mapper.py
index de3b3234..52977e9f 100644
--- a/vectorbt/records/col_mapper.py
+++ b/vectorbt/records/col_mapper.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class for mapping column arrays."""
diff --git a/vectorbt/records/decorators.py b/vectorbt/records/decorators.py
index 5edccbed..d27cbcb3 100644
--- a/vectorbt/records/decorators.py
+++ b/vectorbt/records/decorators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class and function decorators."""
diff --git a/vectorbt/records/mapped_array.py b/vectorbt/records/mapped_array.py
index ea0ee27a..032c3c78 100644
--- a/vectorbt/records/mapped_array.py
+++ b/vectorbt/records/mapped_array.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Base class for working with mapped arrays.
diff --git a/vectorbt/records/nb.py b/vectorbt/records/nb.py
index 20ec1db8..c5ae0e57 100644
--- a/vectorbt/records/nb.py
+++ b/vectorbt/records/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/returns/__init__.py b/vectorbt/returns/__init__.py
index 162ef9b0..b4bea8e3 100644
--- a/vectorbt/returns/__init__.py
+++ b/vectorbt/returns/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with returns.
diff --git a/vectorbt/returns/accessors.py b/vectorbt/returns/accessors.py
index 1a72e648..1263f0f8 100644
--- a/vectorbt/returns/accessors.py
+++ b/vectorbt/returns/accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom pandas accessors for returns data.
diff --git a/vectorbt/returns/metrics.py b/vectorbt/returns/metrics.py
index 1008e2bd..2ddd0d7b 100644
--- a/vectorbt/returns/metrics.py
+++ b/vectorbt/returns/metrics.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Other metrics that are not compiled with Numba."""
diff --git a/vectorbt/returns/nb.py b/vectorbt/returns/nb.py
index 736c199e..ca1398de 100644
--- a/vectorbt/returns/nb.py
+++ b/vectorbt/returns/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/root_accessors.py b/vectorbt/root_accessors.py
index b84054ae..d40d379b 100644
--- a/vectorbt/root_accessors.py
+++ b/vectorbt/root_accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Root pandas accessors.
diff --git a/vectorbt/signals/__init__.py b/vectorbt/signals/__init__.py
index 9c752a34..a12fdfae 100644
--- a/vectorbt/signals/__init__.py
+++ b/vectorbt/signals/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules for working with signals, such as entry and exit signals."""
diff --git a/vectorbt/signals/accessors.py b/vectorbt/signals/accessors.py
index d18508f9..401ba255 100644
--- a/vectorbt/signals/accessors.py
+++ b/vectorbt/signals/accessors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Custom pandas accessors for signals data.
diff --git a/vectorbt/signals/enums.py b/vectorbt/signals/enums.py
index 269f41a2..be9b46ef 100644
--- a/vectorbt/signals/enums.py
+++ b/vectorbt/signals/enums.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Named tuples and enumerated types.
diff --git a/vectorbt/signals/factory.py b/vectorbt/signals/factory.py
index 1eafcdc1..f64f2e15 100644
--- a/vectorbt/signals/factory.py
+++ b/vectorbt/signals/factory.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """A factory for building new signal generators with ease.
diff --git a/vectorbt/signals/generators.py b/vectorbt/signals/generators.py
index 8efa7c5a..39c34f5e 100644
--- a/vectorbt/signals/generators.py
+++ b/vectorbt/signals/generators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Signal generators built with `vectorbt.signals.factory.SignalFactory`."""
diff --git a/vectorbt/signals/nb.py b/vectorbt/signals/nb.py
index 675a1605..4349ec2b 100644
--- a/vectorbt/signals/nb.py
+++ b/vectorbt/signals/nb.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Numba-compiled functions.
diff --git a/vectorbt/utils/__init__.py b/vectorbt/utils/__init__.py
index 587512aa..56333bc5 100644
--- a/vectorbt/utils/__init__.py
+++ b/vectorbt/utils/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Modules with utilities that are used throughout vectorbt."""
diff --git a/vectorbt/utils/array.py b/vectorbt/utils/array.py
index f19a3b8d..8fae85f5 100644
--- a/vectorbt/utils/array.py
+++ b/vectorbt/utils/array.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with arrays."""
diff --git a/vectorbt/utils/attr.py b/vectorbt/utils/attr.py
index 76021591..85541528 100644
--- a/vectorbt/utils/attr.py
+++ b/vectorbt/utils/attr.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with class/instance attributes."""
diff --git a/vectorbt/utils/checks.py b/vectorbt/utils/checks.py
index 7c4486e5..d8cf3621 100644
--- a/vectorbt/utils/checks.py
+++ b/vectorbt/utils/checks.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for validation during runtime."""
diff --git a/vectorbt/utils/colors.py b/vectorbt/utils/colors.py
index 24f9863f..33c36012 100644
--- a/vectorbt/utils/colors.py
+++ b/vectorbt/utils/colors.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with colors."""
diff --git a/vectorbt/utils/config.py b/vectorbt/utils/config.py
index 952e009f..30ad70f6 100644
--- a/vectorbt/utils/config.py
+++ b/vectorbt/utils/config.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for configuration."""
diff --git a/vectorbt/utils/datetime.py b/vectorbt/utils/datetime.py
index f4e7eaec..07c8861c 100644
--- a/vectorbt/utils/datetime.py
+++ b/vectorbt/utils/datetime.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with dates and time."""
diff --git a/vectorbt/utils/decorators.py b/vectorbt/utils/decorators.py
index 38d372d4..1d84925b 100644
--- a/vectorbt/utils/decorators.py
+++ b/vectorbt/utils/decorators.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Class and function decorators."""
diff --git a/vectorbt/utils/docs.py b/vectorbt/utils/docs.py
index cb3be5e1..d14943be 100644
--- a/vectorbt/utils/docs.py
+++ b/vectorbt/utils/docs.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for documentation."""
diff --git a/vectorbt/utils/enum.py b/vectorbt/utils/enum.py
index 18b15fbf..3a3b17c7 100644
--- a/vectorbt/utils/enum.py
+++ b/vectorbt/utils/enum.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Enum utilities.
diff --git a/vectorbt/utils/figure.py b/vectorbt/utils/figure.py
index b0ffc052..169567b7 100644
--- a/vectorbt/utils/figure.py
+++ b/vectorbt/utils/figure.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for constructing and displaying figures."""
diff --git a/vectorbt/utils/image.py b/vectorbt/utils/image.py
index 54562c2f..d07c28e0 100644
--- a/vectorbt/utils/image.py
+++ b/vectorbt/utils/image.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for images."""
diff --git a/vectorbt/utils/mapping.py b/vectorbt/utils/mapping.py
index c02274ac..4f14fa0b 100644
--- a/vectorbt/utils/mapping.py
+++ b/vectorbt/utils/mapping.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Mapping utilities."""
diff --git a/vectorbt/utils/math.py b/vectorbt/utils/math.py
index 8f565a81..395a8801 100644
--- a/vectorbt/utils/math.py
+++ b/vectorbt/utils/math.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Math utilities."""
diff --git a/vectorbt/utils/module.py b/vectorbt/utils/module.py
index 1ede9186..7dc27fa5 100644
--- a/vectorbt/utils/module.py
+++ b/vectorbt/utils/module.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for modules."""
diff --git a/vectorbt/utils/params.py b/vectorbt/utils/params.py
index 88691d74..9675f383 100644
--- a/vectorbt/utils/params.py
+++ b/vectorbt/utils/params.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with parameters."""
diff --git a/vectorbt/utils/random.py b/vectorbt/utils/random.py
index aeee4541..252aefc2 100644
--- a/vectorbt/utils/random.py
+++ b/vectorbt/utils/random.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for random number generation."""
diff --git a/vectorbt/utils/requests.py b/vectorbt/utils/requests.py
index d2aa6eb5..f78a4012 100644
--- a/vectorbt/utils/requests.py
+++ b/vectorbt/utils/requests.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for requests."""
diff --git a/vectorbt/utils/schedule.py b/vectorbt/utils/schedule.py
index b2d5a5f3..bbc840d4 100644
--- a/vectorbt/utils/schedule.py
+++ b/vectorbt/utils/schedule.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for scheduling jobs."""
diff --git a/vectorbt/utils/tags.py b/vectorbt/utils/tags.py
index e902e1ec..8accb648 100644
--- a/vectorbt/utils/tags.py
+++ b/vectorbt/utils/tags.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with tags."""
diff --git a/vectorbt/utils/template.py b/vectorbt/utils/template.py
index b3f85098..ee9f1792 100644
--- a/vectorbt/utils/template.py
+++ b/vectorbt/utils/template.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Oleg Polakow
+# Copyright (c) 2021 Oleg Polakow. All rights reserved.
 # This code is licensed under Apache 2.0 with Commons Clause license (see LICENSE.md for details)
 
 """Utilities for working with templates."""