From 8a685483df8403b9713e376b33dab8fd7484a511 Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Tue, 20 Aug 2019 15:59:08 +0800
Subject: [PATCH] [Add] aroon indicator for ArrayManager

---
 vnpy/trader/utility.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/vnpy/trader/utility.py b/vnpy/trader/utility.py
index ceadb8c6..2c7f4b50 100644
--- a/vnpy/trader/utility.py
+++ b/vnpy/trader/utility.py
@@ -440,6 +440,16 @@ class ArrayManager(object):
             return up, down
         return up[-1], down[-1]
 
+    def aroon(self, n, array=False):
+        """
+        Aroon indicator.
+        """
+        aroon_up, aroon_down = talib.AROON(self.high, self.low, n)
+
+        if array:
+            return aroon_up, aroon_down
+        return aroon_up[-1], aroon_down[-1]
+
 
 def virtual(func: "callable"):
     """