Thu, 10 Feb 2011 16:20:49 +0100 Sylvain Thénault [datafeed] return empty dict when source is fresh avoid crash in the looping task because None returned
(0) -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 tip