Quote from intradaybill:
No, you are mistaken. Backtesting is not used to find trading systems. It is used to reject trading systems. If you do not understand the difference you are in great danger. If you were told otherwise and you paid money for the advice, you should ask your money back.
Only your mind can find a trading system. Backtesting may or may nor reject it. If it is not rejected, it may or may not make money. If it does not make money, you should blame your mind, not backtesting.
This is the story.