I'm using MtGox's PubNub API to fetch ticker data. I've subscribed to the BTC/EUR ticker with id 0bb6da8b-f6c6-4ecf-8f0d-a544ad948c15 . In more than half the cases when I receive a new ticker message, the data is just the same as that of the previous message, except for the timestamp of course. I expected ticker messages only when there is new data available, so I do not understand why the ticker messages get repeated. Examples:
diff_to_previous instant_________ last_all last_local last_orig buy_____ sell____ vwap____ vol_____________ item avg_____ high____ low_____
n/a 2013-12-12 16:31:46 EUR 628.31408 EUR 620.22000 USD 865.00000 EUR 620.22000 EUR 629.00000 EUR 647.91649 BTC 1365.61335998 BTC EUR 649.27938 EUR 680.00000 EUR 615.00000
none 2013-12-12 16:31:50 EUR 628.31408 EUR 620.22000 USD 865.00000 EUR 620.22000 EUR 629.00000 EUR 647.91649 BTC 1365.61335998 BTC EUR 649.27938 EUR 680.00000 EUR 615.00000
none 2013-12-12 16:31:53 EUR 628.31408 EUR 620.22000 USD 865.00000 EUR 620.22000 EUR 629.00000 EUR 647.91649 BTC 1365.61335998 BTC EUR 649.27938 EUR 680.00000 EUR 615.00000
last_all 2013-12-12 16:32:05 EUR 617.41846 EUR 620.22000 USD 850.00000 EUR 620.23000 EUR 629.00000 EUR 647.91649 BTC 1365.61335998 BTC EUR 649.27938 EUR 680.00000 EUR 615.00000
What kind of events trigger a ticker message to be broadcast?
This question is also on
http://bitcoin.stackexchange.com/questions/18611/why-are-ticker-messages-in-the-mtgox-pubnub-api-repeated .
