I have used the same input for GBPUSD USD/CHF pairs.I have used 50.000 bars for M30 time frame ,45.000 bars for out of sample test and 5000 bars for in sample test.I increased the commission to get less signals.My experience is it is always better use less inputs.Sometimes math formula gives better result than the neural network formula with GP.
GBPUSD
http://i61.tinypic.com/2uixfh1.png
USD/CHF
http://i62.tinypic.com/34hamit.png
GBPUSD
http://i61.tinypic.com/2uixfh1.png
USD/CHF
http://i62.tinypic.com/34hamit.png