Forward Testing

Forward testing (sometimes "out-of-sample" or "walk-forward" testing) is the practice of applying a defined strategy to new, live-arriving market data to see whether the edge that showed up in a backtest holds up on data the rules were never fitted to. It sits between backtesting (past data you already have) and live trading (real capital at risk). Logging each result in a journal and respecting a fixed risk-per-trade is what turns it into evidence instead of anecdote.

In plain English — Forward testing means taking a strategy that looked good on past data and watching how it performs on data it has never seen, in real time. Because the future is genuinely unknown, it is a far more honest test than a backtest — there is no hindsight to lean on. It is still a review-and-learning step, not a guarantee.

Your pullback strategy backtested with a positive expectancy over two years. Instead of going live, you forward-test it for the next 40 trades as they actually occur, journaling each one — and only then decide whether the edge is real.