I have decided to heed the advice of good old Rummy,
"Plan backwards as well as forward. Set objectives and trace back to see how to achieve them. You may find that no path can get you there. Plan forward to see where your steps will take you, which may not be clear or intuitive."
However, I'm hoping you can make things seem a little clearer for me than poor Donald did, and if you can offer me tips/ free software for backtesting, that would be great.
Cheers in advance,