Hi, hazek, I have analyzed the trades response and found that there is no any trade_type (bid/ask) field.
We at bitcoin-analytics.com provide calculations and visualization separately for bids and asks trades.

mtgox and btce provide trade type in their api along as almost all chinese exchanges. Currently we have to assign trade type empirically. But we would prefer to use original exchange data for trade type.

I also analyzed Pusher interface trades stream and found that there is also no trade type field in a tade message.

Could it be possible to add this important field into trades http response and pusher trades stream messages?