Iv been thinking about systems trading and backtesting for the last few days, and my conclusion is, its the best way to trade. Its not by all means the only way to trade profitably in the markets, but its the only way you can trade confidently in my opinion, and ill explain why.
For new traders like myself, the last 2-3 have been a dream. We all have a trading plan, and we think our plan works, but every fool and his dog has been making money the last few years, and some bullmarket champions like to think its because of their fundamental research, or because they can read charts, or because of their method. But when you have 80% of the mining sector going up, its not really that hard to make money. Throwing darts, ini-mini-miney-mo, whatever you did the last 3 years, it probably worked.