The QuivoFX website has a heap of trading robots, both free and paid for. Most of them are generic trading robots working across standard technical indicators.
The Envelopes EA that we are using in this instance is the FREE one and we were able to optimise the robot to produce a positive result.
The Envelopes EA uses the standard envelopes indicator to open and close trades.
We ran an optimisation on this trading robot on EURUSD 15minute timeframe and were able to get the below backtest.