diff --git a/docs/source/index.rst b/docs/source/index.rst
index 03c39eb..8ac443a 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -33,10 +33,11 @@ Quick-start
 
     async def main():
         exchange = cro.Exchange()
-        candles = [
-            candle async for candle in exchange.get_candles(cro.Symbol.CROUSDT)
-        ]
-        assert len(candles) > 30
+        candles = await exchange.get_candles(cro.Symbol.CROUSDT)
+        avg_price = 0
+        for candle in candles:
+            avg_price += (candle.open + candle.close) / 2
+        avg_price /= len(candles)
 
     asyncio.run(main())
 
diff --git a/src/cryptocom/exchange/base.py b/src/cryptocom/exchange/base.py
index 9c1ca88..acacfed 100644
--- a/src/cryptocom/exchange/base.py
+++ b/src/cryptocom/exchange/base.py
@@ -39,8 +39,7 @@ class Exchange:
         """Get k-line data over a specified period."""
         data = await self.api.get(
             'klines', {'symbol': symbol.value, 'period': period.value})
-        for candle in reversed(data):
-            yield Candle(*candle)
+        return [Candle(*candle) for candle in reversed(data)]
 
     async def get_trades(self, symbol: Symbol):
         """Get last 200 trades in a specified market."""
diff --git a/src/cryptocom/exchange/enums.py b/src/cryptocom/exchange/enums.py
index 04cf776..ba3c993 100644
--- a/src/cryptocom/exchange/enums.py
+++ b/src/cryptocom/exchange/enums.py
@@ -66,6 +66,7 @@ class OrderStatus(enum.IntEnum):
     .. data:: PENDING_CANCEL
     .. data:: EXPIRED
     """
+
     INIT = 0
     NEW = 1
     FILLED = 2
@@ -131,6 +132,7 @@ class Depth(enum.Enum):
     .. data:: MEDIUM
     .. data:: LOW
     """
+
     HIGH = 'step0'
     MEDIUM = 'step1'
     LOW = 'step2'