timmolter/XChange — pull request #516 by andre77 (2014-07-11 11:55:23+00:00)
Title: Bitstamp getTradeHistory: ASK Trades with negative tradableAmount 

it seams, that the Bitstamp API responses with positive/negative values to distinguish between BID / ASK
this leads to negative values for "price" inside the Trade
the implementation should use the abs() to get rid of the sign