diff --git a/client.py b/client3.py
similarity index 90%
rename from client.py
rename to client3.py
index 3fc09b75f16..8f28faf743b 100644
--- a/client.py
+++ b/client3.py
@@ -35,15 +35,13 @@ def getDataPoint(quote):
     stock = quote['stock']
     bid_price = float(quote['top_bid']['price'])
     ask_price = float(quote['top_ask']['price'])
-    price = bid_price
+    price = (bid_price+ask_price)/2 
     return stock, bid_price, ask_price, price
 
 
 def getRatio(price_a, price_b):
-    """ Get ratio of price_a and price_b """
-    """ ------------- Update this function ------------- """
-    return 1
-
+     if(price_b == 0):
+        return (price_a/price_b)
 
 # Main
 if __name__ == "__main__":
@@ -52,8 +50,10 @@ def getRatio(price_a, price_b):
         quotes = json.loads(urllib.request.urlopen(QUERY.format(random.random())).read())
 
         """ ----------- Update to get the ratio --------------- """
+        prices={}
         for quote in quotes:
             stock, bid_price, ask_price, price = getDataPoint(quote)
+            prices[stock] = price
             print("Quoted %s at (bid:%s, ask:%s, price:%s)" % (stock, bid_price, ask_price, price))
 
-        print("Ratio %s" % getRatio(price, price))
+        print("Ratio %s" % getRatio(prices['ABC'], prices['DEF']))
diff --git a/client_test.py b/client_test.py
new file mode 100644
index 00000000000..3169f51aaa3
--- /dev/null
+++ b/client_test.py
@@ -0,0 +1,28 @@
+import unittest
+from client3 import getDataPoint
+
+class ClientTest(unittest.TestCase):
+  def test_getDataPoint_calculatePrice(self):
+    quotes = [
+      {'top_ask': {'price': 121.2, 'size': 36}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 120.48, 'size': 109}, 'id': '0.109974697771', 'stock': 'ABC'},
+      {'top_ask': {'price': 121.68, 'size': 4}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 117.87, 'size': 81}, 'id': '0.109974697771', 'stock': 'DEF'}
+    ]
+    """Assertion"""
+    for quote in quotes:
+       self.assertEquals(getDataPoint(quote) , (quote['stock'] , quote['top_bid']['price'] , quote['top_ask']['price'], (quote['top_bid']['price'] + quote['top_ask']['price'])/2  ))
+
+  def test_getDataPoint_calculatePriceBidGreaterThanAsk(self):
+    quotes = [
+      {'top_ask': {'price': 119.2, 'size': 36}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 120.48, 'size': 109}, 'id': '0.109974697771', 'stock': 'ABC'},
+      {'top_ask': {'price': 121.68, 'size': 4}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 123.87, 'size': 81}, 'id': '0.109974697771', 'stock': 'DEF'}
+    ]
+    """ ------------ Add the assertion below ------------ """
+    for quote in quotes:
+        self.assertEquals(getDataPoint(quote) , (quote['stock'] , quote['top_bid']['price'] , quote['top_ask']['price'] , (quote['top_bid']['price'] + quote['top_ask']['price'])/2  ))
+
+  """ ------------ Add more unit tests ------------ """
+
+
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/server.py b/server3.py
similarity index 100%
rename from server.py
rename to server3.py