What backtesting is
Backtesting means applying a strategy you’re about to use to historical market data, to check whether it actually had a statistical edge. It’s the verification step before you risk real capital on it.
A simple approach for a retail trader
- Scroll the chart back in time and manually mark every point where your entry condition actually occurred
- Calculate what the outcome would have been at each point, based on your stop and target
- Gather at least 30–50 instances and calculate win rate and risk-reward from them
- No sophisticated software required — a chart and a spreadsheet are enough to start
The limits of backtesting
Performing well on historical data is no guarantee it works going forward. Market conditions keep changing, and backtesting is, at best, a reference confirming that the strategy wasn’t built on nothing — not a promise of future results.
What comes after backtesting: live logging
Once a strategy passes backtesting, keep tracking its live performance in your trading journal after you start trading it. If live results diverge significantly from the backtest, that gap itself is a signal to re-examine the strategy.
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