From cf013140a6b7ed5847bcbf64e05cb7ccab091fbf Mon Sep 17 00:00:00 2001
From: Janne Sinivirta <janne.sinivirta@gmail.com>
Date: Tue, 13 Feb 2018 11:37:59 +0200
Subject: [PATCH] add went_up and went_down helpers

---
 freqtrade/indicator_helpers.py            |  9 +++++++++
 freqtrade/tests/test_indicator_helpers.py | 12 ++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 freqtrade/indicator_helpers.py
 create mode 100644 freqtrade/tests/test_indicator_helpers.py

diff --git a/freqtrade/indicator_helpers.py b/freqtrade/indicator_helpers.py
new file mode 100644
index 000000000..7464710d6
--- /dev/null
+++ b/freqtrade/indicator_helpers.py
@@ -0,0 +1,9 @@
+from pandas import Series
+
+
+def went_up(series: Series) -> Series:
+    return series > series.shift(1)
+
+
+def went_down(series: Series) -> Series:
+    return series < series.shift(1)
diff --git a/freqtrade/tests/test_indicator_helpers.py b/freqtrade/tests/test_indicator_helpers.py
new file mode 100644
index 000000000..90330a6ef
--- /dev/null
+++ b/freqtrade/tests/test_indicator_helpers.py
@@ -0,0 +1,12 @@
+import pandas as pd
+from freqtrade.indicator_helpers import went_up, went_down
+
+
+def test_went_up():
+    series = pd.Series([1, 2, 3, 1])
+    assert went_up(series).equals(pd.Series([False, True, True, False]))
+
+
+def test_went_down():
+    series = pd.Series([1, 2, 3, 1])
+    assert went_down(series).equals(pd.Series([False, False, False, True]))