I would love to see okcoin get added
https://www.okcoin.com/about/rest_api.do

Also, I am not sure if trailing stops are in here, but would love this to be an option for a more manual trading. For example, set buy/sell at x price (pending order). Would want to have stoploss within y% of order once executed. The result is that it will only move in one direction while never going in the other. For longs, it moves stop up but never down in price.