From c465552df4b37be165157a1ad6c7e9e22e92f4b2 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Thu, 2 Apr 2020 20:17:54 +0200
Subject: [PATCH] Update comment to mention .copy() usage

---
 freqtrade/strategy/interface.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 6307e664e..c6f711b74 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -467,6 +467,9 @@ class IStrategy(ABC):
         """
         Creates a dataframe and populates indicators for given candle (OHLCV) data
         Used by optimize operations only, not during dry / live runs.
+        Using .copy() to get a fresh copy of the dataframe for every strategy run.
+        Has positive effects on memory usage for whatever reason - also when
+        using only one strategy.
         """
         return {pair: self.advise_indicators(pair_data.copy(), {'pair': pair})
                 for pair, pair_data in data.items()}