I wish i had the opportunity to trade on OkCoin. The project has decent documentation on everything but backtesting i would have to say, I couldn't ever figure that out myself. I found running multiple tribecas at the same time on the same exchange with a different width settings helped me achieve a positive return more often then not. As far as being stable it really depended on the exchange for me. Coinbase was far less stable then running it on bitfinex, until the updated the coinbase api that is.