returning last candle close price for a pair

freqtrade/exchange/__init__.py

@@ -164,6 +164,12 @@ class Exchange(object):
         else:
             return None
 
+    def last_kline_close(self, pair: str):
+        if pair in self._klines:
+            return self._klines[pair].iloc[-1]['close']
+        else:
+            return None
+
     def set_sandbox(self, api, exchange_config: dict, name: str):
         if exchange_config.get('sandbox'):
             if api.urls.get('test'):

freqtrade/tests/exchange/test_exchange.py

@@ -814,6 +814,9 @@ def test_refresh_tickers(mocker, default_conf, caplog) -> None:
         assert isinstance(exchange.klines(pair), DataFrame)
         assert len(exchange.klines(pair)) > 0
 
+    # test last kline close price
+    assert exchange.last_kline_close('XRP/ETH') == 4
+
     # test caching
     exchange.refresh_tickers(['IOTA/ETH', 'XRP/ETH'], '5m')