diff --git a/stock_indicators/_cstypes/datetime.py b/stock_indicators/_cstypes/datetime.py
index 8ffb0f3f..b4eb4de8 100644
--- a/stock_indicators/_cstypes/datetime.py
+++ b/stock_indicators/_cstypes/datetime.py
@@ -19,11 +19,11 @@ class DateTime:
         >>> cs_now
         3/26/2021 10:02:22 PM
     """
-    def __new__(cls, datetime) -> CsDateTime:
+    def __new__(cls, datetime: PyDateTime) -> CsDateTime:
         return CsDateTime.Parse(datetime.isoformat())
 
 
-def to_pydatetime(cs_datetime):
+def to_pydatetime(cs_datetime: CsDateTime) -> PyDateTime:
     """
     Converts C#'s `System.DateTime` struct to a native Python datetime object.
 
diff --git a/stock_indicators/_cstypes/decimal.py b/stock_indicators/_cstypes/decimal.py
index 4d7f81fe..a179de76 100644
--- a/stock_indicators/_cstypes/decimal.py
+++ b/stock_indicators/_cstypes/decimal.py
@@ -9,7 +9,7 @@ class Decimal:
     Class for converting a number into C#'s `System.Decimal` class.
 
     Parameters:
-        decimal : `int`, `float` or any `object` that can be represented as a number.
+        decimal : `int`, `float` or any `object` that can be represented as a number string.
 
     Example:
         Constructing `System.Decimal` from `float` of Python.
@@ -22,7 +22,7 @@ def __new__(cls, decimal) -> CsDecimal:
         return CsDecimal.Parse(str(decimal), CsCultureInfo.InvariantCulture)
 
 
-def to_pydecimal(cs_decimal):
+def to_pydecimal(cs_decimal: CsDecimal) -> PyDecimal:
     """
     Converts an object to a native Python decimal object.
 
diff --git a/stock_indicators/indicators/common/quote.py b/stock_indicators/indicators/common/quote.py
index 1254c43f..c75beafe 100644
--- a/stock_indicators/indicators/common/quote.py
+++ b/stock_indicators/indicators/common/quote.py
@@ -1,13 +1,12 @@
+from datetime import datetime
 from decimal import Decimal
-from typing import Iterable
+from typing import Any, Iterable, Optional
 
-from stock_indicators._cslib import CsQuote
-from stock_indicators._cslib import CsQuoteUtility
+from stock_indicators._cslib import CsQuote, CsQuoteUtility
 from stock_indicators._cstypes import List as CsList
 from stock_indicators._cstypes import DateTime as CsDateTime
 from stock_indicators._cstypes import Decimal as CsDecimal
-from stock_indicators._cstypes.datetime import to_pydatetime
-from stock_indicators._cstypes.decimal import to_pydecimal
+from stock_indicators._cstypes import to_pydatetime, to_pydecimal
 from stock_indicators.indicators.common.enums import CandlePart
 from stock_indicators.indicators.common._contrib.type_resolver import generate_cs_inherited_class
 
@@ -56,7 +55,9 @@ class _Quote:
     close = property(_get_close, _set_close)
     volume = property(_get_volume, _set_volume)
 
-    def __init__(self, date, open = None, high = None, low = None, close = None, volume = None):
+    def __init__(self, date: datetime, open: Optional[Any] = None,
+                 high: Optional[Any] = None, low: Optional[Any] = None,
+                 close: Optional[Any] = None, volume: Optional[Any] = None):
         self.date = date
         self.open: Decimal = open if open else 0
         self.high: Decimal = high if high else 0
@@ -86,4 +87,7 @@ def use(cls, quotes: Iterable["Quote"], candle_part: CandlePart):
 
 
 class Quote(generate_cs_inherited_class(_Quote, CsQuote)):
-    """A single dated quote containing OHLCV elements."""
+    """
+    A single dated quote containing OHLCV elements.
+    OHLCV values can be given as any object that can be represented as a number string.
+    """