diff --git a/README.md b/README.md
index 7bed154..a78f065 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,20 @@ A python client for the Gemini API and Websocket
 
 ## Getting Started
 ### Installation
+From Package
 ```python
-pip install gemini_python
+pip3 install gemini_python
+```
+From Source
+```python
+pip3 install .
+```
+Then:
+```python
+pip3 uninstall websocket
+pip3 uninstall websocket-client
+pip3 install websocket-client
+
 ```
 Possibly: `pip install websocket-client==0.44.0`
 
diff --git a/gemini/private_client.py b/gemini/private_client.py
index 690d049..366d8af 100644
--- a/gemini/private_client.py
+++ b/gemini/private_client.py
@@ -236,8 +236,8 @@ def active_orders(self):
         """
         return self.api_query('/v1/orders')
 
-    @typeassert(symbol=str, limit_trades=int)
-    def get_past_trades(self, symbol, limit_trades=None):
+    @typeassert(symbol=str, limit_trades=int, since=int)
+    def get_past_trades(self, symbol, limit_trades=None, since=0):
         """
         Returns all the past trades associated with the API.
         Providing a limit_trade is optional.
@@ -253,6 +253,10 @@ def get_past_trades(self, symbol, limit_trades=None):
             "symbol": symbol,
             "limit_trades": 500 if limit_trades is None else limit_trades
         }
+
+        if since != 0:
+            payload["timestamp"]=since
+
         return self.api_query('/v1/mytrades', payload)
 
     def get_trade_volume(self):