Moving should_not_update logic to async function per pair. if there is

no new candle, async function will just return the last cached candle
locally and doesn’t hit the API

freqtrade/freqtradebot.py

@@ -137,22 +137,9 @@ class FreqtradeBot(object):
         """
         # TODO: maybe add since_ms to use async in the download-script?
         # TODO: Add tests for this and the async stuff above
-
-        ticker_interval = self.strategy.ticker_interval
-        interval_in_seconds = constants.TICKER_INTERVAL_MINUTES[ticker_interval] * 60
-
-        should_not_update = ((self._klines_last_fetched_time +
-                              interval_in_seconds + 1) > round(time.time()))
-
-        if should_not_update:
-            return False
-
         logger.debug("Refreshing klines for %d pairs", len(pair_list))
         datatups = asyncio.get_event_loop().run_until_complete(
-            self.exchange.async_get_candles_history(pair_list, ticker_interval))
-
-        # fetching the timestamp of last candle
-        self._klines_last_fetched_time = datatups[0][1][-1][0] / 1000
+            self.exchange.async_get_candles_history(pair_list, self.strategy.ticker_interval))
 
         # updating klines
         self._klines = {pair: data for (pair, data) in datatups}