diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 3dd643561..57282aae9 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -162,6 +162,10 @@ class Backtesting(object):
             pair_data['buy'], pair_data['sell'] = 0, 0  # cleanup from previous run
 
             ticker_data = self.populate_sell_trend(self.populate_buy_trend(pair_data))[headers]
+
+            # to avoid using data from future, we buy/sell with signal from previous candle, not current
+            ticker_data.buy = ticker_data.buy.shift(1)
+            ticker_data.sell = ticker_data.sell.shift(1)
             ticker = [x for x in ticker_data.itertuples()]
 
             lock_pair_until = None