BUG atr and true_range calculation fix

.gitignore

@@ -126,7 +126,6 @@ examples/ib_trader.ipynb
 examples/example2.ipynb
 setup.cfg
 .README.md
-README
 note.md
 driver.py
 doc.py
@@ -141,4 +140,5 @@ qd.py
 simple.ipynb
 
 # Indicator
-pandas_ta/overlap/ft.py
+pandas_ta/overlap/ft.py
+pandas_ta/overlap/psar.py

pandas_ta/volatility/true_range.py

@@ -13,7 +13,7 @@ def true_range(high, low, close, drift=None, offset=None, **kwargs):
 
     # Calculate Result
     prev_close = close.shift(drift)
-    ranges = [high - low, high - prev_close, low - prev_close]
+    ranges = [high - low, high - prev_close, prev_close - low]
     true_range = DataFrame(ranges).T
     true_range = true_range.abs().max(axis=1)
 

setup.py

@@ -6,7 +6,7 @@ long_description = "An easy to use Python 3 Pandas Extension with 80+ Technical
 setup(
     name ="pandas_ta",
     packages =['pandas_ta', 'pandas_ta.momentum', 'pandas_ta.overlap', 'pandas_ta.performance', 'pandas_ta.statistics', 'pandas_ta.trend', 'pandas_ta.volatility', 'pandas_ta.volume'],
-    version ="0.1.37b",
+    version ="0.1.38b",
     description =long_description,
     long_description =long_description,
     author ="Kevin Johnson",