From b69a9134f59f3eed093dc0fad8c5b7191cdcb888 Mon Sep 17 00:00:00 2001
From: saeedrss <saeedrss@yahoo.com>
Date: Fri, 23 Apr 2021 21:27:13 +0430
Subject: [PATCH 1/3] fixing support for HitBTC #4778

hitbtc by default send candle from beginning (not most recently)
this change fixed
---
 freqtrade/exchange/exchange.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index ed7918b36..809cdb4e1 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -874,8 +874,15 @@ class Exchange:
                 "Fetching pair %s, interval %s, since %s %s...",
                 pair, timeframe, since_ms, s
             )
-
-            data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
+			#fixing support for HitBTC #4778
+            if self.name== 'HitBTC':
+                data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
+                                                        since=since_ms,
+                                                        limit=self.ohlcv_candle_limit(timeframe),
+                                                        params={"sort": "DESC"}
+                                                         )
+            else:
+                data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
                                                      since=since_ms,
                                                      limit=self.ohlcv_candle_limit(timeframe))
 

From 0b280a59bc4413e46e4277b2a66e95d3baca3378 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Sat, 1 May 2021 17:29:53 +0200
Subject: [PATCH 2/3] Support per exchange params for OHLCV endpoint

---
 freqtrade/exchange/__init__.py |  1 +
 freqtrade/exchange/exchange.py | 15 +++++----------
 freqtrade/exchange/hitbtc.py   | 26 ++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 10 deletions(-)
 create mode 100644 freqtrade/exchange/hitbtc.py

diff --git a/freqtrade/exchange/__init__.py b/freqtrade/exchange/__init__.py
index 889bb49c2..23ba2eb10 100644
--- a/freqtrade/exchange/__init__.py
+++ b/freqtrade/exchange/__init__.py
@@ -14,5 +14,6 @@ from freqtrade.exchange.exchange import (available_exchanges, ccxt_exchanges,
                                          timeframe_to_seconds, validate_exchange,
                                          validate_exchanges)
 from freqtrade.exchange.ftx import Ftx
+from freqtrade.exchange.hitbtc import Hitbtc
 from freqtrade.exchange.kraken import Kraken
 from freqtrade.exchange.kucoin import Kucoin
diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 809cdb4e1..6642b946d 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -59,6 +59,7 @@ class Exchange:
     _ft_has_default: Dict = {
         "stoploss_on_exchange": False,
         "order_time_in_force": ["gtc"],
+        "ohlcv_params": {},
         "ohlcv_candle_limit": 500,
         "ohlcv_partial_candle": True,
         "trades_pagination": "time",  # Possible are "time" or "id"
@@ -874,17 +875,11 @@ class Exchange:
                 "Fetching pair %s, interval %s, since %s %s...",
                 pair, timeframe, since_ms, s
             )
-			#fixing support for HitBTC #4778
-            if self.name== 'HitBTC':
-                data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
-                                                        since=since_ms,
-                                                        limit=self.ohlcv_candle_limit(timeframe),
-                                                        params={"sort": "DESC"}
-                                                         )
-            else:
-                data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
+            params = self._ft_has.get('ohlcv_params', {})
+            data = await self._api_async.fetch_ohlcv(pair, timeframe=timeframe,
                                                      since=since_ms,
-                                                     limit=self.ohlcv_candle_limit(timeframe))
+                                                     limit=self.ohlcv_candle_limit(timeframe),
+                                                     params=params)
 
             # Some exchanges sort OHLCV in ASC order and others in DESC.
             # Ex: Bittrex returns the list of OHLCV in ASC order (oldest first, newest last)
diff --git a/freqtrade/exchange/hitbtc.py b/freqtrade/exchange/hitbtc.py
new file mode 100644
index 000000000..b9d32b56d
--- /dev/null
+++ b/freqtrade/exchange/hitbtc.py
@@ -0,0 +1,26 @@
+""" hitbtx exchange subclass """
+import logging
+from typing import Dict
+
+from freqtrade.exchange import Exchange
+
+
+logger = logging.getLogger(__name__)
+
+
+class Hitbtc(Exchange):
+    """
+    Hitbtc exchange class. Contains adjustments needed for Freqtrade to work
+    with this exchange.
+
+    Please note that this exchange is not included in the list of exchanges
+    officially supported by the Freqtrade development team. So some features
+    may still not work as expected.
+    """
+
+    # fetchCurrencies API point requires authentication for Hitbtc,
+    _ft_has: Dict = {
+        "ohlcv_candle_limit": 1000,
+
+        "ohlcv_params": {"sort": "DESC"}
+    }

From bdd0184f0bdd9329d9aaada8f7fbf91146fe0d41 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Sat, 1 May 2021 17:44:43 +0200
Subject: [PATCH 3/3] Small stylistic fixes

---
 freqtrade/exchange/hitbtc.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/freqtrade/exchange/hitbtc.py b/freqtrade/exchange/hitbtc.py
index b9d32b56d..763535263 100644
--- a/freqtrade/exchange/hitbtc.py
+++ b/freqtrade/exchange/hitbtc.py
@@ -1,4 +1,3 @@
-""" hitbtx exchange subclass """
 import logging
 from typing import Dict
 
@@ -21,6 +20,5 @@ class Hitbtc(Exchange):
     # fetchCurrencies API point requires authentication for Hitbtc,
     _ft_has: Dict = {
         "ohlcv_candle_limit": 1000,
-
         "ohlcv_params": {"sort": "DESC"}
     }