What is Backtesting?
Risk & strategyTesting a trading rule on past price data to see how it would have performed.
Think of it like: Practising a game plan on old matches.
Real example: Testing whether "buy above the 20-day average" worked on 10 years of gold prices.
Lesson: Backtesting and overfitting Practise it now: Stop Loss Sniper Practise it now: Survival Math