Any chance of additional exchanges being added? If so I would like to see Crypto-trade on there.
I've checked crypto-trade. the trade history API needs authorize. I wrote some code to request, authorize is passed, but server return 500 Internal Error array_key_exists() expects parameter 2 to be array, boolean given for private/getinfo and I'm afraid the TradeHistory is similar to BTC-e, only returns the trade of owner, then crypto-trade's trades cannot be tracked.
Good news, the API returns trade history. so there is no problem.
another useful thing would be listing on http://bitcoincharts.com/markets/. Not sure if it makes sense me to write them, they still need cooperation from crypto-trade.com operators.
Once their API is in place, that will be possible. I believe they are in the testing phase of their API.