def fetchOHLCV(self, symbol, timeframe='1m', since=None, limit=None, params={}):
    return self.fetch_ohlcv(symbol, timeframe, since, limit, params)
def fetchOHLCV(self, symbol, timeframe='1m', since=None, limit=None, params={}):
    return self.fetch_ohlcv(symbol, timeframe, since, limit, params)