From d73e7f292a96fc0a6181ac9076174fc2bb8bda70 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Mon, 17 Apr 2023 19:42:41 +0200
Subject: [PATCH] simplify Leverage tier code

---
 freqtrade/exchange/exchange.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index ba7d79f97..b5ea247ef 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -2371,12 +2371,12 @@ class Exchange:
                 # Must fetch the leverage tiers for each market separately
                 # * This is slow(~45s) on Okx, makes ~90 api calls to load all linear swap markets
                 markets = self.markets
-                symbols = []
 
-                for symbol, market in markets.items():
+                symbols = [
+                    symbol for symbol, market in markets.items()
                     if (self.market_is_future(market)
-                            and market['quote'] == self._config['stake_currency']):
-                        symbols.append(symbol)
+                        and market['quote'] == self._config['stake_currency'])
+                ]
 
                 tiers: Dict[str, List[Dict]] = {}