Adrian Reid explains core requirements for trading system success: understand what a system is and how it works; manage expectancy and risk; watch for "future leaks" and hidden risks outside the backtest; account for slippage and commissions; form a hypothesis, test it, record outcomes, and draw conclusions. He emphasizes a step-by-step, expert-guided backtesting methodology to avoid short-term, fragile systems.
We've got to understand what a system is, how it works. We've got to understand enough about expectancy, risk management so we know what we're sort of looking for. So what are the watch outs? You know, we need to watch out for future leaks. We need to watch out for hidden risks, large losses that are lurking in the, you know, outside the backtest, those sorts of things. We need to understand things like slippage and commission and how they factor in. Because if you test without those things, you inevitably find short term systems that work amazingly well. But then you add slippage and commission to them, they fall apart. Having a hypothesis, figuring out how to test that hypothesis, testing it, recording the outcome and then drawing a conclusion, I think that's really powerful. And then the expert's guide to back testing process and just having that step by step methodology makes a big difference.
Sam.
