{"id":6439,"date":"2026-10-09T20:09:05","date_gmt":"2026-10-09T18:09:05","guid":{"rendered":"https:\/\/propaccount.com\/?post_type=glossary&#038;p=6439"},"modified":"2026-10-09T20:09:05","modified_gmt":"2026-10-09T18:09:05","slug":"what-is-backtesting","status":"publish","type":"glossary","link":"https:\/\/propaccount.com\/zh\/resources\/glossary\/what-is-backtesting\/","title":{"rendered":"\u4ec0\u4e48\u662f\u56de\u6d4b\uff1f"},"content":{"rendered":"<p><b>\u56de\u6d4b<\/b><span style=\"font-weight: 400;\"> 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"glossary-category":[131],"class_list":["post-6439","glossary","type-glossary","status-publish","hentry","glossary-category-trader-glossary"],"acf":{"target_keyword":"backtesting","glossary_post_image":"","key_takeaway":"Key Takeaway","key_takeaway_description":"Backtesting is the process of testing a trading strategy against historical market data to evaluate how it would have performed. It is useful as a first filter for strategy selection but has significant limits, including hindsight bias, overfitting, and the gap between simulated and live execution.","faq":"<b>What metrics does a backtest typically report?<\/b>\r\n\r\n<span style=\"font-weight: 400;\">Common metrics include win rate, average profit per winning trade, average loss per losing trade, maximum drawdown, profit factor, number of trades, and the overall return across the backtest period. More advanced reports also include risk-adjusted metrics such as the Sharpe ratio and expectancy per trade.<\/span>\r\n\r\n<b>Why do backtested strategies often underperform in live trading?<\/b>\r\n\r\n<span style=\"font-weight: 400;\">Several reasons. Backtests can be overfitted to specific historical conditions that do not repeat. They often exclude or underestimate real-world execution factors such as slippage, spread variation, and partial fills. And emotional decisions during live trading can cause traders to deviate from the rules the strategy was tested on. The gap between backtested results and live performance is one of the most common reasons new prop firm traders fail challenges.<\/span>\r\n\r\n<b>Is backtesting worth doing before a prop firm challenge?<\/b>\r\n\r\n<span style=\"font-weight: 400;\">Yes, as a first filter. A strategy that fails to produce profit in backtesting is unlikely to produce it in live markets. But passing a backtest does not guarantee passing a challenge. Most consistently successful prop firm traders combine backtesting with forward testing on a demo account before deploying the strategy on a live challenge.<\/span>"},"_links":{"self":[{"href":"https:\/\/propaccount.com\/zh\/wp-json\/wp\/v2\/glossary\/6439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/propaccount.com\/zh\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/propaccount.com\/zh\/wp-json\/wp\/v2\/types\/glossary"}],"wp:attachment":[{"href":"https:\/\/propaccount.com\/zh\/wp-json\/wp\/v2\/media?parent=6439"}],"wp:term":[{"taxonomy":"glossary-category","embeddable":true,"href":"https:\/\/propaccount.com\/zh\/wp-json\/wp\/v2\/glossary-category?post=6439"}],"curies":[{"name":"WordPress","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}