optimize imports

freqtrade/strategy/default_strategy.py

@@ -2,9 +2,10 @@
 
 import talib.abstract as ta
 from pandas import DataFrame
+
 import freqtrade.vendor.qtpylib.indicators as qtpylib
-from freqtrade.strategy.interface import IStrategy
 from freqtrade.indicator_helpers import fishers_inverse
+from freqtrade.strategy.interface import IStrategy
 
 class_name = 'DefaultStrategy'