Add more 'bad' characters that appear in the market symbols on some exchanges

freqtrade/data/history.py

@@ -225,7 +225,7 @@ def refresh_data(datadir: Path,
 
 
 def pair_to_filename(pair: str) -> str:
-    for ch in ['/', ' ', '.']:
+    for ch in ['/', '-', ' ', '.', '@', '$', '+', ':']:
         pair = pair.replace(ch, '_')
     return pair
 

tests/data/test_history.py

@@ -152,6 +152,13 @@ def test_testdata_path(testdatadir) -> None:
     ("ETHH20", 'ETHH20'),
     (".XBTBON2H", '_XBTBON2H'),
     ("ETHUSD.d", 'ETHUSD_d'),
+    ("ADA-0327", 'ADA_0327'),
+    ("BTC-USD-200110", 'BTC_USD_200110'),
+    ("F-AKRO/USDT", 'F_AKRO_USDT'),
+    ("LC+/ETH", 'LC__ETH'),
+    ("CMT@18/ETH", 'CMT_18_ETH'),
+    ("LBTC:1022/SAI", 'LBTC_1022_SAI'),
+    ("$PAC/BTC", '_PAC_BTC'),
 ])
 def test_pair_to_filename(pair, expected_result):
     pair_s = pair_to_filename(pair)