BLD: revert hourly freq support reported at issue #227

catalyst/examples/simple_loop.py

@@ -26,7 +26,7 @@ def handle_data(context, data):
         context.asset,
         fields='price',
         bar_count=20,
-        frequency='2H'
+        frequency='30T'
     )
     last_traded = prices.index[-1]
     log.info('last candle date: {}'.format(last_traded))

catalyst/exchange/exchange.py

@@ -13,6 +13,7 @@ from catalyst.exchange.exchange_errors import MismatchingBaseCurrencies, \
     PricingDataNotLoadedError, \
     NoDataAvailableOnExchange, NoValueForField, \
     NoCandlesReceivedFromExchange, \
+    InvalidHistoryFrequencyAlias,  \
     TickerNotFoundError, NotEnoughCashError
 from catalyst.exchange.utils.datetime_utils import get_delta, \
     get_periods_range, \
@@ -508,6 +509,10 @@ class Exchange:
             frequency, data_frequency, supported_freqs=['T', 'D', 'H']
         )
 
+        if unit == 'H':
+            raise InvalidHistoryFrequencyAlias(
+                freq=frequency)
+
         # we want to avoid receiving empty candles
         # so we request more than needed
         # TODO: consider defining a const per asset